Dear Ashish, 

You are surely for JEE Advanced as cut off percentile for Schedule Caste is 54.0128155 and therefore you are eligible to apply for it. 

Since you have got more percentile, you can apply for it. 

JEE Advanced  application form is available from May 3 to May 9 .

HOPE IT HELPS FOR YOU. 

hi ashish............................

77percentile in jee main under sc category is good and cut off for sc is also below 77 percentile that means you qualify the jee main exam and eligible for stage 2 which is jee advance so best of luck for youe advance exam.

hpoe i solve your query.