Question

The stethoscope was invented by
A. Rene Laennec
B. Wilhelm Roentgen
C. Edward Jenner
D. Joseph Lister

Answer 1

The stethoscope is acoustic medical equipment used for auscultation, or listening to an animal's or human's internal sounds. A tiny disc-shaped resonator is usually put against the skin, and one or two ducts are attached to two earpieces. A stethoscope can be used to listen to heart, lung, and gut noises, as well as blood flow in arteries and veins. It is typically used to measure blood pressure in conjunction with a manual sphygmomanometer. Stethoscopes are a symbol of healthcare professionals.

Complete answer:
Option A: The stethoscope was invented in $1816$ by Rene Laennec, a French physicist. Laennec's first stethoscope was a wooden tube that resembled a trumpet. He discovered it because he doesn't like placing his ears on a woman's chest to listen to her heartbeat.
Hence, option A is correct.
Option B: Wilhelm Conrad Rontgen was a German mechanical engineer and physicist, who, on 8 November $1895$, produced and detected electromagnetic radiation in a wavelength range known as X-rays or Rontgen rays. In $1901$, he was awarded the Nobel Prize in Physics for this achievement.
Hence, option B is incorrect.
Option C: Edward Jenner, FRS FRCPE, was an English physician and scientist who developed the notion of vaccinations, notably the world's first vaccination for smallpox. The names vaccine and vaccination come from the term Variolae vaccine, which Jenner coined to describe cowpox.
Hence, option C is incorrect.
Option D: Joseph Lister, ${1^{st}}$ Baron Lister OM, PC, PRS, FRCSE, FFPS ($5$ April $1827$ – $10$ February $1912$), was a pioneer of antiseptic surgery in the United Kingdom. Lord Lister was not a particularly skilled surgeon in terms of technique, but his studies into bacteriology and infection in wounds elevated his surgical technique to a new level, and his observations, conclusions, and practices revolutionized surgery around the world.
Hence, option D is incorrect.

Hence, Option A is the correct answer.

Note:
Rene Laennec was a physician and musician who was born on February ${17^{th}}$, $1781$. His full name is Rend-Theophile-Hyacinthe Laennec. Rene Laennec died of tuberculosis at the age of $45$. Rene Laennec Hamman's murmur is known as an annexe-Hamman symptom, and Laennec's cirrhosis is the appearance of a regenerated liver with annannexedssue.