Doubt from Sn reaction

final product with mechanism

I think this mechanism will going

Is the ans A? No @abhijit_2020 here first step is frienkelstein reaction, then there will be double bond and I will get separated so two double bonds is P i think this

Final product is phenol acc. to the answer

I having problem in the last step that how phenol is formed

Ok i understood

My sir told me now that vicinal diol in acidic medium undergoes dehydration to form phenol @Pranay_2020

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