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?

[UPSC Civil Services Exam – 2013 Prelims]

(a) 1 only

(b) 2 and 3 only

(c) 1 and 3 only

(d) 1, 2 and 3


Answer: (d)

Explanation:

  • Iron is present in the muscle in the form of myoglobin.
    • Myoglobin has the capacity to store oxygen.
    • Hence statement 1 is correct.
  • Calcium is the most common and abundant mineral in the body.
    • It is important for healthy bones and teeth, helps the muscle relax and contract, important in nerve functioning, blood clotting etc.
    • Hence statement 2 is correct.
  • Sodium is needed for proper fluid balance, nerve transmission, and muscle contraction.
  • Hence statement 3 is correct.

Consider the following statements:                                                                   The Parliament of India can place a particular law in the Ninth Schedule of the Constitution of India. The validity of a law placed in the Ninth Schedule cannot be examined by any court and no judgement can be made on it. Which of the statements given above is/are correct?

Consider the following statements:                                               

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Consider the following statements:                                                         The Parliament of India can place a particular law in the Ninth Schedule of the Constitution of India. The validity of a law placed in the Ninth Schedule cannot be examined by any court and no judgement can be made on it. Which of the statements given above is/are correct?

Consider the following statements:                                               

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