Hello Shabad.
If You have already completed your graduation degree  you can pursue a 3 year Law degree. There are 2 types of Law degrees- 5 year integrated law courses which combine an undergrad degree with law which you can join directly after 12th and a 3 year LLB degree which you can pursue after completion of graduation. So in your case a 3 year law degree would be the most suitable choice.
As you're talking about CLAT, it is an entrance test for admission in National Law Universities in India for 5 year integrated law courses only. It does not provide admission to 3 year law courses. So you should consider other options that you have for admission in 3 year LLB courses.
Here is a list of various entrance exam for admission to top colleges for LLB-
- DU LLB - Delhi University
MH CET- GLC mumbai, ILS Pune and other colleges in Maharashtra
SLAT- Symbiosis Law school
PU LLB- Panjab University, Chandigarh 
LSAT- Jindal global Law school, IIT Kharagpur and other private law colleges
BHU LLB- Banaras Hindu University
BVP LLB- Bharatiya Vidyapeeth
TS LAWCET
AP LAWCET
Best of luck!

Hi Shabad.

Greetings.

As you have completed your under graduate studies i.e. b.com so you should opt for PG.

Thanks.

Osmania University

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