In TNEA, selection shall be made under seven categories namely OC, BC, BCM (BC Muslim), MBC & DNC, SC, SCA and ST following the rule of reservation of Government of Tamil Nadu as follows. Category Percentage of reserved seats Open Competition 31% Backward Class 26.5% Backward class Muslim 3.5% Most Backward Class and Denotified Communities 20% Scheduled Caste 15% Scheduled Caste Arunthathiyars 3% Scheduled Tribes 1% Total 100%