A

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Q. Night blindness is cause by lack of which vitamin?

  • (A) Vitamin A
  • (B) Vitamin B
  • (C) Vitamin C
  • (D) Vitamin D
  • Correct Answer - Option(A)
  • Views: 1
  • Filed under category Biology
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Explanation by: Admin

Vitamin A is essential for the production of rhodopsin, a pigment in the retina that helps the eyes see in low light. A deficiency in Vitamin A impairs the eye’s ability to adjust to darkness, leading to night blindness (nyctalopia).

Why other options are incorrect:

  • (B) Vitamin B – B vitamins support energy metabolism and nerve function, not night vision.
  • (C) Vitamin C – Important for immunity and skin health, not directly linked to night vision.
  • (D) Vitamin D – Helps in calcium absorption and bone health, not in vision adaptation to darkness.

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