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Nyctalopia also called 'Night Blindness' is a condition making it difficult or impossible to see in relative low light. It is a symptom of several eye diseases. It may exist from birth, or be caused by injury or malnutrition. It is caused in human due to deficiency of vitamin(a) A (b) B (c) C (d) D |
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Answer» Correct option (a) A Explanation: Vitamin A is a group of unsaturated nutrional organic compounds, that includes retinol, retinal, retionic acid and several provitamin A carotenoids, among which beta caroteen is the most important. Vitamine A is teh vitamin whose deficiency may cause night blindness. |
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