Comment on Futures & Options Filters

Hi sir , what will happen for the below situations given , ( all are just examples , not real values )
i think one stock will rise from here CMP is 90
if i sell one 100 PE strike at premium Rs.10 and with buy 90 PE strike at premium Rs.8.
if the stock cross abv 100 at expiry or before , i will get 2 Rs profit ,and both the PE values will be zero , ie .05 paise
what if there is no buyer at expiry end ? how will i square of my PE bought and PE sold ?
will any extra stt for that PE sold ?

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