GENERAL KNOWLEDGE

GK

BIOLOGY

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Night blindness is cause by lack of which vitamin?
A
Vitamin A
B
Vitamin B
C
Vitamin C
D
Vitamin D
Explanation: 

Detailed explanation-1: -Night blindness is one of the first signs of vitamin A deficiency. In its more severe forms, vitamin A deficiency contributes to blindness by making the cornea very dry, thus damaging the retina and cornea.

Detailed explanation-2: -Vitamin A deficiency can result from a diet low in vitamin A or an absorption or liver disorder. Night blindness is an early symptom. Blindness can eventually develop. The eyes, skin, and other tissues become dry and damaged, and infections develop more often.

Detailed explanation-3: -Vitamin A is found in many foods, such as spinach, dairy products and liver. Other sources are foods rich in beta-carotene, such as green leafy vegetables, carrots and cantaloupe. Your body converts beta-carotene into vitamin A.

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