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?
A1 only
B2 and 3 only
C1 and 3 only
D1, 2 and 3
Answer & Solution
Correct answer: D. 1, 2 and 3
UPSC CSE Prelims 2013 (GS-I, Set A), Q.50. Official answer key: D.
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