2014 GS Paper I, all questions
UPSC Prelims 2014 · GS Paper I
Question 97: Science and Technology
Consider the following pairs :
| Vitamin | Deficiency disease | |
|---|---|---|
| 1. | Vitamin C | Scurvy |
| 2. | Vitamin D | Rickets |
| 3. | Vitamin E | Night blindness |
Which of the pairs given above is/are correctly matched?
a1 and 2 only
b3 only
c1, 2 and 3
dNone
AnswerUPSC’s answer is (a).
Vitamin C deficiency causes scurvy, with bleeding gums and poor wound healing, and vitamin D deficiency causes rickets, in which bones soften. Vitamin E is not linked to night blindness: night blindness is caused by vitamin A deficiency, as vitamin A forms the visual pigment in the retina. So pairs 1 and 2 are correct and pair 3 is wrong.
- 1. Lack of vitamin C causes scurvy.
- 2. Lack of vitamin D causes rickets.
- 3. Night blindness comes from vitamin A deficiency.
Why each option is right or wrong
- (a) Right. Scurvy from vitamin C and rickets from vitamin D are correct.
- (b) Wrong. Night blindness is caused by lack of vitamin A, not E.
- (c) Wrong. Pair 3 is mismatched.
- (d) Wrong. Pairs 1 and 2 are correct.
Answer: UPSC’s key. Explanation: written by UPSC Grade, not by UPSC.
Source: UPSC, Civil Services (Preliminary) Examination 2014, General Studies Paper I, Series A. The paper on upsc.gov.in.