Hey Rahul

i assume that you are talking about the Indian Military Academy which you can join via CDS SSB after graduation or through tech entry after 12th. Since you have not mentioned which entry you were referring to I am going to assume that you were talking about CDS. In CDS there is no reservation of seats based on caste hence the marks needed to be scored is the same for general and an sc student that is more or less around:

For OTA (WOMEN) the expected cut off is 92
For OTA (MEN) the expected cut off is 92
For Navy the expected cut off is 115
For Air Force the expected cut off is 100
For Army the expected cut off is 115