Hello prerana !!Government colleges in kolkata offering bsc.course in zoology are below:

Maulana Azad college

Acharya prafulla chandra college(APCC)

Lady Brabourne college

Sarojini naidu college for women

Brahmananda Keshab chandra college

Surendranath college

and...yahh this is the list of government colleges among this  Maulana Azad college has top rating and best one .Hope the above information helped you.All the best !!