Hello Jegatha.

See ur son mark is just a bit low for him to bag a seat in the govt college even under one category in the TAMIL Nadu even applying state quota as the cut off in T.N is too high as compared to other states to pursue his higher studies in the field of his interest under MBBS courses. I m providing u a link for ur help.

https://www.google.com/url?sa=t&source=web&rct=j&url=https://medicine.careers360.com/articles/neet-cut-off/amp&ved=2ahUKEwih1JbL6obiAhUZ6nMBHccvDzEQFjAKegQIARAB&usg=AOvVaw13ncSIsRF6_r3F1MyqcLzL&ampcf=1

Ask if any query. Good luck