With an AIR of 348161, getting an MBBS seat in a Tamil Nadu government medical college under either the All India Quota (15%) or State Quota (85%) is not possible, even under reserved categories.

Based on previous year trends:

• For AIQ, SC/OBC seats usually close within ranks under 1.3 lakh.

• For Tamil Nadu State Quota, SC closing ranks are around 48,000, and BC around 18,000.

Your rank is significantly beyond these cut-offs, so admission to MBBS in government colleges is unlikely.

Alternate options:

• Apply to private medical colleges in Tamil Nadu or other states.

  Recommended

• Explore AYUSH courses like BAMS, BHMS, or BPT, which have lower cut-offs.

• Consider repeating NEET for a better score next year.

• Check for management quota seats if financially viable.

According to your rank that is  3.48 lakh, it is almost impossible to secure an MBBS seat in Tamil Nadu government colleges even for SC/ST or OBC. Usually the government seats ranks closed around 3500-4000. Even Government BDS or Ayush courses are also not possible in this rank. You can try for private colleges.