Sucession opens on date of death.
Thus rlate with local laws if any in Tamilnadu, pertaining to daughters..
Thereafter refer to Hindu Succession Amendment (2005) Act.
Oral partition has to be proved.
If against Rs.5lacs only Rs.1.5 lacs was paid then it has to be established. Bar by limitation if any has to be tackled.
Are you a trained legal mind/lawyer?
Have you discussed with a very able local counsel specializing in revenue/property/civil/family matters and well versed with local laws?
If yes what is his/her opinion?