All Stock F&O contracts to be settled physically by Oct 2019 expiry

my question is that if my Expiry is 31 dec 2020 but still i’ve been intimated to increase the margin… however by rules “margin will be increased in the last week of expiry.” how is that.? any help?

Margins for Long ITM Options are blocked from expiry minus 4 days, which typically will be Friday, but as Friday is holiday, Thursday becomes the expiry minus 4th day.

ohh, so is it possible to only close cut one leg - long itm strike to keep other half position running…?

i been informed 10% of margin available is needed if i managed that amount in account then i can run position until expiry or two day prior to expiry right?

This margin will increase every trading day until expiry. This has been explained in detail here.