Match List-I with List-II.
| List-I | List-II | ||
|---|---|---|---|
| Vitamin | Deficiency Disease | ||
| (A) | Vitamin – A | (I) | Scurvy |
| (B) | Vitamin – C | (II) | Rickets |
| (C) | Vitamin – D | (III) | Non-clotting of blood |
| (D) | Vitamin – K | (IV) | Colour blindness |
Choose the most appropriate answer from the options given below:
Answer & explanation
Correct answer: option 2
The correct answer is Option (2) → (A)-(IV), (B)-(I), (C)-(II), (D)-(III)
(A) Vitamin – A — this matches (IV) Colour blindness, by elimination. Vitamin A is needed to make rhodopsin, the light-sensitive pigment of the rods of the eye, so its deficiency causes night blindness (and, if severe, xerophthalmia). Colour blindness is not a deficiency disease; it is inherited.
(B) Vitamin – C — this matches (I) Scurvy. Vitamin C is needed to make collagen; without it the gums swell and bleed and wounds heal slowly.
(C) Vitamin – D — this matches (II) Rickets. Vitamin D helps the body absorb calcium and phosphorus; in its absence children’s bones stay soft and bend.
(D) Vitamin – K — this matches (III) Non-clotting of blood. The liver needs vitamin K to make clotting factors such as prothrombin, so its deficiency delays clotting.
Note: It seems that there is a mistake in the original NTA paper, which prints ‘Colour blindness’ as the deficiency disease of vitamin A when it should read ‘Night blindness’. Since vitamins C, D and K are matched beyond doubt, Option (2) is still the only possible answer. NTA mixed up two kinds of blindness here, but your marks are safe.