Can I pursue law after completing B.Com (Hons.)?

After B.Com, you need to LLB. But a Law degree alone is not enough to become a practicing lawyer. After completing Law School, one must pass the All-India Bar Exam (AIBE). Eligible persons are admitted as advocates on the rolls of the State Bar Councils.

Dear aspirant, Yes you are eligible for LL.B. Eligibility Criteria: For admission to the LL.B. Course, Aspirants should have completed their Bachelor's degree successfully with a minimum aggregate of 45% in any recognised institution. Aspirants must ensure that they give the entrance exams required

Yes you can definitely do the same.

Yes, a law degree with CA/CA can provide you a very good profile with good package.