I've got 45% in BA, can I get admission in LLB?

The eligibility depends on whether you want to go for 3 year LL.B. That is after graduation or 5-year LL.B. That can be pursued after 12th. Also one thing to be noted is that till last year there was no age limit for any of the above after various High Courts removed age limit in CLAT and 3 year LL.