Hi Abanindra,

The best private colleges offering BSc Physics Hons. course in Kolkata are as follows:-

• St Xavier's College, Kolkata
• Lady Brabourne College, Kolkata
• Bhawanipur Education Society College, Kolkata
• Acharya Prafulla Chandra College, Kolkata
• City College, Kolkata
• Vivekananda College, Thakurpukur
• Bangabasi College, Kolkata
• Seth Anandram Jaipuria College, Kolkata
• Ramakrishna Mission Residential College, Kolkata
• St Paul's Cathedral Mission College, Kolkata
• Maharaja Manindra Chandra College, Kolkata

Refer here for more info - https://university.careers360.com/colleges/list-of-physics-degree-colleges-in-kolkata?degree=B.Sc.(Hons)&ownership=Private

Feel free to ask doubts in the Comment Section.

I hope this information helps you.

Good Luck!