Pledge and un pledge charges in Fyers

Hello all., 

    I have two question.. 

1) How much it cost for pledge and unpledge..

2) If I want to sell an atm option I approximately need 1.65L.. So how much minimum fund I need to have in my account and how much pledged money I can use.. Is there any percentage for this  
 

And clarify the percentage for cash and collateral  for intraday option selling also.. So it will be useful to me 

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