What will happen to ITM options in USDINR if there are no buyers?

If I have bought USDINR options and it becomes ITM and there are no buyers to squareoff what will happen to the position on expiry?

The Options will be settled by exchange at Intrinsic Value and any profit/loss will be credited to / debited from your account.

What about STT charges?

STT isn’t applicable on Currency F&O.