Q. What did cardiologist Dr. Paul Zoll invent in Massachusetts in 1952?

  • (A) Artificial heart
  • (B) Artificial heart valve
  • (C) EKG
  • (D) Pacemaker
✅ Correct Answer: (D) Pacemaker

Published by Ram Sharma ⭐ 193.88K Points at 13-Jan-2022 05:05 pm in General Awareness

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