Polytechnic

Top engineering colleges in West Bengal are mentioned in the link provided below. You should be able to navigate to a college and course of your choice using the filters on the web page. The ranking is based on rankings published by India Today, The Week, and National Institute Ranking Framework (MHRD).
https://www.shiksha.com/b-tech/ranking/top-engineering-colleges-in-west-bengal/44-2-127-0-0

Yes, you can definitely do this course.

Dear friend,
Yes, you can do definitely. Check out the eligibility criteria below:
Eligibility Of the Bachelor of Hotel Management [BHM]
For BHM the basic eligibility is 10+2 pass. Many colleges also demand an aggregate of 50% in the same and English is also required as one of the subjects. Many colleges also have an age criteria where in upper age limit is set as twenty-two years for those belonging to the General and Other Backward Classes (OBC) category and 25 for the Scheduled Caste (SC) and Scheduled Tribe (ST) category.

Yes, you are eligible for B.Tech. Now from this year Diploma is equivalent to 12th and with Diploma you can get admission in lateral entry mean direct in second year of B.Tech but you have to crack the entrance exam.

Computer Science is the best for the Ethical Hacker.

Yes, why not. It's all about passion and hardwork. Best regards.

Yes, a Polytechnic student from outside of Andhra Pradesh can get the admission in ANGRAU but the admission is in Management quota.

Environmental engineering has a very good branch and have lot of scope nowadays. After declaring the result, you have to fill the form of Polytechnic and choice the course which you like on the basis of merit, you are eligible for CAP round.

Hi Shivam,
Polytechnic is a 3-year course after class 10th or 12th. Better to go for Polytechnic after class 10th.

Yes, you are eligible but you have to crack the entrance exam conducted by every state.