PPSC Past Paper Excise & Taxation Inspector Region (LAHORE) Excise, Taxation & Narcotics Control Department 2018 Solved MCQs, Everyday Science MCQs, PPSC Solved Past Papers MCQsWho postulated the law of universal gravitation?A. Nicholas Copernicus B. Kepler C. Isaac Newton D. Albert Einstein The cultural Centre of ancient Gandhara civilization was situated at?Choose the correct meaning of the idiom to drive home?