📊 Biology
Q. Which factor increases cardiac output?
  • (A) Low heart rate
  • (B) Increased heart rate
  • (C) Dehydration
  • (D) Blood loss
✅ Correct Answer: (B) Increased heart rate

Explanation: Higher heart rate increases the volume of blood pumped, raising cardiac output.

Explanation by: Mr. Dubey
Higher heart rate increases the volume of blood pumped, raising cardiac output.

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