Q. What is the approximate time required for a heart-beat -

  • (A) 0.8 2nd
  • (B) 1.0 minute
  • (C) 0.5 minute
  • (D) 0.5 2nd
✅ Correct Answer: (A) 0.8 2nd

Published by Ruchi Sharma ⭐ 9.87K Points at 26-Aug-2021 06:39 am in Science

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