Will I face any difficulty in pursuing BA (political science and history) if I have done my 12th with science stream (PCB)?

Taking a gap year after Class 12 will not harm your chances at all for B.Com admissions in Kolkata, as top private colleges like St. Xavier's College explicitly allow students to apply up to 3 to 5 years after passing school. Since admissions are a pure merit game based strictly on your Class 12 boa

Yes, you can totally start applying to some private B.Com colleges in Kolkata before your 12th results are out by registering on their portals under a "Result Awaited" status, but you can't actually lock in your seat until your official marks drop. Think of it like booking a spot in line—colleges li

No, a gap year after the 12th will not negatively affect your admission at private or affiliated colleges in Midnapore. 
Most undergraduate colleges in Midnapore operate under the rules of Vidyasagar University, which explicitly allows students to take admission into 1st-year undergraduate cours

The B.Sc. Environment course is generally less competitive than courses like Computer Science or Biotechnology, so the chances may improve. However, admission cannot be guaranteed because merit lists change every year based on student applications and available seats.

With 69.33% in 12th Science, get

Yes, even a decrease of one mark will be implemented. CBSE 12th re-evaluation can increase or decrease in marks.