PPSC Assistant (BS-16), Anti-Corruption Establishment Punjab 2020, Everyday Science MCQs, PPSC PAST PAPER ASSISTANT in PPSC 2022 Solved MCQs, PPSC Solved Past Papers MCQsStethoscope was invented by ?A. René Laennec B. Galeleo Galilei C. Zacharias Janssen D. none of these The circumference of earth ?Iron cross is the highest gallantry award of ?
