Science

Yes, there is no problem in that. If you think that Maths is your weak area, then it's a wise decision, drop the subject as it can have a negative impact on your 12th board results. Don't get persuaded by your peers or relatives.
Just do what suits you the best.

Kolkata's top rated nursing college are:
Techno India university
Allah university
Medical college Kolkata.

The books to prepare/reference for CUCET MBA exam are:
Quantitative Aptitude for Competitive Examination by RS Agarwal.
General Knowledge by Arihant.
English Grammar in Use by Raymond Murphy.
Complete Mathematics by Lucent's Publication.
High School English Grammar and Composition by Wren and martin.

Yes it is a good option to pursue as competition is not as far as in other fields.

The fee structure at Narmada College of Science and Commerce for B.Sc. in Chemistry is around INR 77000 annually and this institute fee is quite nominal as compared to other colleges.

Some colleges of specialised Physics in Trivandrum are:
Farook College, Kozhikode. B.Sc. Physics.
Mar Ivanios College, Nalanchira. B.Sc. Physics.
Maharaja's College, Ernakulam.
St Thomas College, Thrissur.
St Teresa's College, Ernakulam.
Christ College, Irinjalakuda.
St Joseph's College, Devagiri.
Government Victoria College, Palakkad.

Some of the colleges you can look for:
Veterinary College, Bangalore
Karnataka Veterinary Animal and Fisheries Science University
Southern Regional Station, National Dairy Research Institute.

All India Pre Veterinary Test will probably be held in the second week of July 2023.