PPSC Past Paper Assistant Planning & Development 2019 Solved MCQs, General Knowledge MCQs, PPSC Solved Past Papers MCQsWho invented the telephone?A. Graham Bell B. Robert koch C. Newton D. none of these Which one of the following countries has direct access to Black Sea?The average weight of A,B and C is 45kg. If the average weight of A and B is 40 Kg and that of B and C is 43 kg, then weight of B is?
