Margin Money (MIS/NRML order)

Hi ,

i)Can i place an MIS order for option writing between 3.20 - 3.30 pm?
OR
ii)Do i have to place a NRML order, if trade has to be done between 3.20 and 3.30 pm for option writing since in Zerodha all MIS orders are squared off compulsory at 3.20 pm

If suppose i place NRML order, can the margin cost is more than that of the money available in account i)can i settle it after 3.30 pm?
OR
ii)The order does not get executed?

Ex : i have margin money for only 10 lots and i placed a trade for 15 lots under NRML order between 3.20 - 3.30
i)will this order get executed or canceled in Zerodha?
‚Äčii)If this is executed and my MTM is negative can i settle the margin money after 3.30 pm ?