@sadiasabir i second you. i was thinking same as u r thinking now. the main reason is i consult KAMRAN SAGHIR (5th position PAS-2018, he got 171 in phy). he said that u sould go for physics bcoz its a jackpot. 2ndly physics has very vast outline so always paper setter will never go for complexity. after his saying i makeup my mind to opt physics.
another reason for phy is PMS. if i dont choose phy then there would be a mixture of subjects i.e. between PMS and CSS.

i cant contact Him for such a question as I don't have his e-mail or contact no. thats why i put my question here