CBSE 12th

Hi Arun,
Please check with BSEB directly. Also, check with your school.

Hi Ayush,
If you want to continue with science you can opt for B.E./B.Tech, B.Arch, B.Sc IT, B.Sc, BCA, etc. Alternate options could be BBA, B.Com, Defence, etc.

Hi Satyabrata,
There are specific norms attached to it. Please choose as per your own choice. CBSE and ICSE are better if you desire to apply abroad.

Hi Koyel, You can check for Diploma courses but remember no course will guarantee you a job. For better prospects complete your 10+2 through NIOS and earn a Bachelor's degree as well.

Hi Shivam, best varies from individual to individual. There are many options but you have to decide what is best for you, know what you want, here are some popular options after commerce -
B.Com
BA Economics
CA
CS
CFA
BA - LLB
BBA
BCA
Bachelors in Accounting and Finance
BMS
Bachelor in Financial market
Actuarial Science
Insurance
Mass Media and so on.
Check college websites for minimum eligibility before applying.

Hi Ayush, here's a list of entrance exams for commerce students after 12th
Common Proficiency Test
UPSEE
IPU CET
CFA
SET
ITLA
LSAT
CLAT
AILET
UGAT-AIMA
BIT BHMCTET
ST. Xaviers Entrance Test for BMS and BMM
Christ University BBA Entrance Exam etc.

Yes, kindly visit www.cuchd.in or University campus as admissions are going on. Moreover, many companies visited Chandigarh University last year.

JEE'18 will improve your standard even if you crack it or not. But if you prepare for it, you can have some basic standard which you can prove during your job exams. so better prepare for JEE'18.

It is not possible to pursue any engineering degree while studying in classes 11 and 12. You need to complete 12th class with a good score to do engineering.
To pursue genetic engineering you should take PCB and you are advised to write some entrance exams like JEE Mains, VIT , SRM, etc. in order to get a good college for biotechnology and genetic engineering.