ICAR AIEEA

Yes, you can go with these subjects since only Physics and Chemistry are compulsory.
3ed subject can be either biology/agriculture/maths. Can apply for ICAR.

No inorder to get in B.Sc. Biotechnology it is not needed to give the ICAR AIEEA exam as it is mainly for B.Sc. Agriculture course you can opt for multiple colleges that provide biotechnology courses and have there own process of selection based on merit or written exam.

Yes AIEEA-UG exam guide is a very good guide to get admission in B.Sc. Agriculture and has information and questions from all the subjects you need to get in the course.

ICAR UG exam pattern is like
Physics - 50 questions
Chemistry -50 questions
Agriculture /bio - 50 question
As per the analysis it's seen that Physics in ICAR is not much difficult the questions solve easily. But in order to get a good college, you need to concentrate more on Chemistry and bio. And should give time and effort to Physics also. All the best.

It is a government university and the admission process is based on merit obtained in the entrance conducted by the university itself
UAS offers B.Tech in
food Science
Agricultural engineering
UAS offer B.Sc. In
Agriculture maco. Forestry
Seri
Agricultural biotechnology
ICAR AIEEA 2022 Application form will be released through online mode by April 2022. NTA ICAR AIEEA 2022 is conducted to offer admission to UG & PG courses. Indian Council of Agricultural Research (ICAR) can organize the All India Entrance Examination for Admission (AIEEA). .

You can apply for NDRI karnal in online mode. Admission process is based on entrance AIEEA and after clearing exam interview will be held on national level. ICAR AIEEA 2022 Application form will be released from the 4th week of July 2022 through online mode.

You can check out the following for more information - https://www.shiksha.com/science/icar-aieea-exam.

Counselling must be attended. However, the possibility of getting a government college is moderate.

Chances of getting government college is very less, but you can try out for private colleges.

Counselling must be attended. However, the possibility of getting a government college is very less.