Can I do LL.B after my graduation ? and for that do i need to give CLAT ?

You can apply for LLB progremma after completing your Graduation. CLAT is the Nationla level exam for the admission Integrated Five years law programme & postgraduate LLM programme, It does not offer three years law programme.

To apply for three years law programme threre are many universities which have their own entrance Exam. Here are some of the top universities you can prefer like Faculty of Law Delhi University, Faculty of Law Banaras Hindu University etc.

If you wish to take admission in any particular college then let me know.

Good Luck!