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Science and Technology question from UPSC CSE-Prelims, 2013

Consider the following minerals:

1. Calcium
2. Iron
3. Sodium 

Which of the minerals given above is/are required by human body for the contraction of muscles?

Last updated Aug 8, 2026
Correct Answer: Option D — 1, 2 and 3
• Correct Answer: (d) 1, 2 and 3
• Explanation: Calcium triggers the contraction process; Sodium is essential for the electrical impulse; Iron (in myoglobin) stores the oxygen required for muscle energy.
Answer verified by Quintessence Classes faculty — Karan Nagar, Srinagar.
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UPSC CSE 2013 Prelims

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Exam UPSC CSE
Stage Prelims
Year 2013
Subject Science and Technology
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