Hello Aspirant,

Central Hindu School BHU is one of the most renowned schools in Varanasi. You can sit for its entrance exams. Keep checking website of BHU as it releases form for school on it.

Other than this you have

Kendriya vidyalaya BLW

Kendriya vidyalaya BHU

DLW Inter College

Jawahar Navodaya vidyalaya

Etc

Hope this helps!!