Question 2
Night blindness and Bitot's spots in the eye are deficiency symptoms of which vitamin?
The right answer is the one marked above.
Vitamin A. It is essential for forming the visual pigment that sight depends on, so a shortage shows in the eyes first.
Its other symptoms follow from its second job — keeping the skin clear and healthy: dry skin, papule-like eruptions on the elbows and knees, and diseases of the respiratory system.