HELLO AYUSH,

as you secured the rank 4639 its very good in CGPET,

the admission through the BITS BHILAI is through the marks of the candidate secured in the CGPET if you are from general category yoou should be secured minimum 90 marks to get a CSE seat in BITS BHILAI. or else other caste reservation your marks should be miniumum of 65+ in the exam of CGPET

so you can secure a seat in the BITS BHILAI