Hello

Eligibility criteria for indian coastguard are:

Age :21 to 25

Education:   candidate should  passed in Graduation from any recognised university. Minimum 60% in graduation is needed

Mathematics and physics in 12th means candidates how have taken science stream upto 12th is only eligible for the same.

If you have taken science upto 12th and taken physics and maths. Then you are eligible othwise not.

Feel free to ask

Good Luck...