📊 Biology
Q. Which factor affects blood viscosity?
  • (A) Water intake
  • (B) Red blood cell count
  • (C) Heart rate
  • (D) Lung capacity
✅ Correct Answer: (B) Red blood cell count

Explanation: Higher RBC count increases blood thickness and resistance.

Explanation by: Roshan
Higher RBC count increases blood thickness and resistance.

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