Which mineral is essential for strong bones and teeth?
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✅ Correct Answer: B — Calcium
Calcium is the most essential mineral for building and maintaining strong bones and teeth. About 99% of body's calcium is stored in bones and teeth in the form of calcium phosphate (hydroxyapatite). Calcium also plays vital roles in muscle contraction, nerve function, blood clotting, and enzyme activity.
❌ Why other options are wrong:
• A. Iron — Iron is needed for haemoglobin production (oxygen transport) and enzyme function. Iron deficiency causes anaemia, not weak bones.
• C. Potassium — Potassium is essential for heart function, nerve signals, and muscle contraction; not specifically for bones.
• D. Sodium — Sodium regulates fluid balance, blood pressure, and nerve impulses; not for bone strength.
📝 Important Note: Calcium = Bones + Teeth strength (99% of calcium is in bones). Calcium absorption requires Vitamin D. Calcium deficiency: Osteoporosis (brittle bones in adults), Rickets (soft bones in children). Best sources: milk, dairy products, green leafy vegetables. Daily requirement: ~1000 mg for adults. SSC CGL mineral-function association.
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