📊 Biology
Q. Which hormone regulates calcium levels in blood?
  • (A) Insulin
  • (B) Parathyroid hormone
  • (C) Thyroxine
  • (D) Adrenaline
✅ Correct Answer: (B) Parathyroid hormone

Explanation: PTH increases blood calcium levels.

Explanation by: Mr. Dubey
PTH increases blood calcium levels.

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