nahi bhai
there are some 46 scrips (list available at nse site) which will be physically settled, if positions remained open at expiry and on such scrips STT will be charged at higher rates (something similar to what is now, if one fails to close his position on expiry)
But most of the brokers will not allow to take position about 4 days before expiry or will ask yo to sq off your position accordingly
BTW, nothig to do with NRML or MIS