Question

Night blindness is caused due to deficiency of

• A. Vitamin - C
• B. Vitamin - A
• C. Vitamin - D
• D. Vitamin - E

Answer 1

The correct option is B Vitamin - A

• Vitamin A deficiency leads to a disease known as night blindness. People with night blindness have a normal vision when adequate light is present but poor vision in the dark.
• Vitamin A is necessary for the production of retinal, a component of rhodopsin.
• Rhodopsin is required for sensing dim light. Since deficiency of vitamin A leads to inadequate production of retinal it results in night blindness.
  Thus the correct answer is option B.