Hello vivek,
Well my friend there is no reservation criteria for science stream.

UPSC Exam Details : Age Limit

A candidate must have attained the age of 21 years and must not have attained the age of 32 years on August 1 of the year of examination. For OBC the upper age limit is 35, and for SCand STthe limit is 37 years.

Numbers of attempts for UPSC Exam

General category candidates: 4

OBC category candidates = 7

SC/ST Candidates = unlimited

Check this link out for more information

https://googleweblight.com/i?u=https://superprofs.com/blog/upsc/upsc-exam-details/&hl=en-IN

well, YOU can apply for the UPSC, for UPSC you just need to be graduate. there are three rounds of UPSC

• prelims
• mains
• interview

minimum age to appear in UPSC is 21 and maximum is 30 years and 4 attempts, for SC/ST its 35 with no limit on number of attempts

its nothing like for UPSC you should be a humanity student, student of any stream can give exam of UPSC

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