posture, or accessories—but the critical detail lies in the stethoscope itself. Compare each stethoscope carefully:
Anatomy
Doctor A and Doctor C both have fully functional stethoscopes with earpieces.
Doctor B’s stethoscope is missing the earpieces.
A real stethoscope requires two earpieces for the doctor to hear a patient’s heartbeat and breathing. Without them, the instrument cannot function properly.
