📊 Biology
Q. Which factor increases resistance in blood vessels?
  • (A) Vasodilation
  • (B) Vasoconstriction
  • (C) Increased hydration
  • (D) Exercise
✅ Correct Answer: (B) Vasoconstriction

Explanation: Narrowing of blood vessels increases resistance and raises blood pressure.

Explanation by: Mr. Dubey
Narrowing of blood vessels increases resistance and raises blood pressure.

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