Do not make arbitrary statements. I have given the NSE definition of Settlement Price from NSE website.
View attachment 21835
Read and understand before writing. Here the Settlement price on
Options Contracts on Index and Individual Securities
Final Exercise Settlement
Closing Price of such underlying security (or index) on the last trading day of the options contract.
So, STT is charged on this settlement price, and not the actual settlement price. But the options contract is settled as per regular definition of Options contract!
Now that I have explained everything clearly, I should return the favor. What intrigues me is whether you have any ulterior motive to make arbitrary statements.