Margin Required for selling coverd call

F&O
1

I hold 1 lot of INDUSINDBK 640, i want to sell 660 OCT CE.
do i need 5 lac for margin in last week of expire ?

2

Even if you hold underlying shares the margin requirements will increase during last two days of expiry.

3

now can i get the margin from pledging these shares ?

4

Yes, you can pledge the shares for margin.