Stethoscope was invented by ----

A ) Rene Laennee ✅

B ) Steven Sasson

C ) Robert Ledley

D ) Martin cooper

Related Questions
  1. Who discovered first vaccine?
  2. The printer was discovered by
  3. Which of the following radiation has the most energetic photon?
  4. In which year was the printer discovered?
  5. First working laser developed by -----:
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