CBSE 12th

Hello Vishal,
Yes, you are eligible.
General Eligibility Criteria of WBJEE 2019
Nationality: The candidate should be a citizen of India
Age Criteria: The minimum age required by the candidate to be eligible for WBJEE 2019 is 17 years as on December 31, 2019. The candidate should have been born on or before December 31, 2002. There is no upper limit for B.Tech programmes except for Marine Engineering where the upper age limit is 25 years as on December 31, 2019. Academic Qualification: The candidates should have qualified his/ her 10+2 (or equivalent) examination with Physics and Mathematics along with any one of Chemistry/ Biology/ Biotechnology/ Computer Science/ Computer Application as compulsory subjects with individual passing marks (in both theory and practical wherever applicable) in all the three subjects mentioned above in regular class mode. Those candidates who will be appearing in the qualifying exam in 2019 will also fulfill the eligibility criteria of WBJEE 2019. Marks Required: General category candidates should have secured an aggregate of 45% and reserved category candidates should have scored 40% in the above three subjects taken together to be eligible for WBJEE 2019. All candidates are required to have qualified English in 10+2 with atleast 30% marks. The board of the qualifying examination must be recognised by Central and State government concerned.
Regards.

Yes you can pursue career as a Cabin Crew. The educational requirement is just 12th pass. Graduation will be additional qualification although it is not a requisite.
In general Candidate Profile for Freshers for cabin crew is as under :
Age:Between 18 and 27 years
Minimum Height:Men - 170 cms and Women - 157 cms
Weight:In proportion to height
Educational Qualification:HSC (10 + 2). Candidates who are appearing for their HSC examinations can also apply
Physical features:Pleasing personality, clear complexion (scars, pimples and blemishes not acceptable) and good eyesight
Marital Status:Unmarried
Language skills:Fluency in English and Hindi. Proficiency in a foreign language will be an added advantage.
Interactive skills:Excellent communication and good interpersonal skills
Nationality:Indian citizens only
Passport:Must possess a valid Indian passport or should have applied for a passport
Mandatory Documentation :Must possess a Pan Card and Aadhaar Card
So that becomes very clear that it merely requires some grooming to get the job of a cabin crew. They don't demand much from candidates.
You should be interpersonally sound and capable to handle people from different cultures.
Cabin crew is the face of the airline. Coz they face the passengers for the first time.
Foreign languages like German, French, Russian, Arabic, Chinese and Japanese, Can allow you to get an edge over others.
As this allows the airline to roster you on routes where such languages are spoken.

Pilots are highly paid professionals and the salaries range in Lacs per month. You may start training at any age below 30 provided you are medically fit as per DGCA requirements. You need to understand that Pilot training is governed and regulated by DGCA and it is irrespective of the flying school you choose to train with. For becoming a commercial pilot, there is a specific eligibility criteria, which you should first be aware of. This is decided on what subjects have you taken in class 12th. It requires PCM with 50% marks to be a pilot. And, even if you have not opted for the same, then you can appear separately for these subjects and become eligible. Further, you should be aware that you are medically fit to be a pilot, so I would suggest you to visithttp://www.dgca.nic.in/medical/medical-ind.htmandgototheclass2nd examiners tab to find out doctors who will examine you for initial fitness. You can visit any doctorate from the list as per your convenience. Once you are done with Class 2nd medical, find out a suitable flying club for you as per your convenience. You can fly in India or abroad. I would suggest you fly in India. Besides finding the club, be aware that you will have to appear for:
1. Air Navigation
2. Aviation Meteorology
3. Air Regulations
4. Aviation Technical
5. Aircraft Specific
6. Radio Telephony
Here, 1-5 are conducted by DGCA and 6 is conducted by WPC. Prepare for these subjects and appear, as exams are conducted every quarterly. For preparation, flying club will help you or there are private instructors available in metro cities as well. You will fly for 200Hrs + Clear DGCA and WPC exams + Clear Class 1st medical, then you shall get your CPL. The next license is ATPL, which you shall be able to apply for once. You will then have to probably fund or self-sponsor your type rating on whatever fleet you are selected in an airline. Then, you finally get a job as a pilot. I hope the process is well explained to you. CPL is an expensive affair. It might cost you around Rs.18-20 Lacs for flying + DGCA exams Rs.500/- each exam + Medicals for Rs.10, 000 + endorsements and license issue fees around Rs.25k + Type Rating around Rs.15 Lacs. So, decide wisely before you enter the field. Some good flying schools in India are listed under:
1. IGRUA Raebarelie
2. NFTI Gondia
3. Chimes Aviation, Sagar
4. NFC, Nagpur
5. BFC, Mumbai
6. Carver Aviation, Baramati
7. GMR Avaition Academy
Abroad you may get trained in Florida, Dubai, Miami, Malaysia etc.