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 ? Posted on April 10, 2021March 6, 2022 by Rana TahirA. René Laennec B. Galeleo Galilei C. Zacharias Janssen D. none of theseShare this:Click to share on Twitter (Opens in new window)Click to share on Facebook (Opens in new window)Click to share on WhatsApp (Opens in new window)Click to share on Pinterest (Opens in new window)Click to share on LinkedIn (Opens in new window)