To pursue an LLB (Bachelor of Laws) in India, eligibility typically depends on your academic qualifications and the institution's specific requirements. Since you mentioned that you have completed your graduation with less than 45% marks and later completed your post-graduation from Netaji Subhas Open University, your eligibility for an LLB program might be affected by the graduation percentage.

Here are some key points to consider:

1. **General Eligibility Criteria**: Most universities and law colleges require a minimum of 45-50% in graduation for admission to a 3-year LLB course. However, this percentage requirement can vary, and some institutions may have relaxations for reserved categories.

2. **Post-Graduation Consideration**: Some universities consider the marks obtained in a postgraduate degree when the candidate's graduation marks are below the required percentage. Since you've completed your post-graduation, this could potentially improve your chances, depending on the institution's admission criteria.

3. **Specific University Rules**: Each law college or university may have its own set of rules. You should directly check with the universities or colleges you're interested in applying to, such as those affiliated with state universities or open universities, to confirm their specific eligibility requirements.

Given your situation, it would be wise to inquire directly with the institutions you're considering, especially those that may accept postgraduate qualifications as part of their eligibility criteria.