This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Miscellaneous, Subject name: Medicine
The Modern Stethoscope was invented by 
Select and explain. 
A. Rene Laennec, B. Golding Bird, C. Arthur Leared, D. George Phillip Cammann
D: George Phillip Cammann
Answer: D: George Phillip Cammann 
Explanation: (D) George Phillip Cammann# Stethoscope was invented in France in 1816 by Rene Laennec at the Necker-Enfants Malades Hospital in Paris. It consisted of a wooden tube and was monaural.> In 1840, Golding Bird described a stethoscope he had been using with a flexible tube.> Irish physician Arthur Leared invented a binaural stethoscope.> The modern binaural Stethoscope was invented by the American physician George Philip Cammann in 1852.> George Cammann perfected the design of the instrument for commercial production, which has become the standard ever since.> Cammann also wrote a major treatise on diagnosis by auscultation, which the refined binaural stethoscope made possible.