A potentially explosive battle over admission to medical courses is brewing in Tamil Nadu, where DMK chief MK Stalin today led a protest against the Governor's delay in signing a bill that reserves 7.5 per cent of seats for government school students. The bill was passed by the state Assembly on September 15 but the BJP Government appointed Governor Banwarilal Purohit has asked for extra time - three to four weeks - to decide on signing off on the legislation. In his reply to Mr Stalin on this subject, the Governor said he was "getting it examined from all angles".