WITHOUT MATHS AND WITH COMPUTER APPLICATION SUBJECT , IS HE ELIGIBLE FOR BCA ADMISION?
The subject eligibility for BCA Admission is to have Maths compulsorily at 10+2 level with computer science or application being optional subject.
You are not eligible for admission into BCA course since you don't have mathematics at 10+ 2 level. Having or not having computer applications in 10-2 doesn't affect admission into BCA.