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The deficiency of Vitamin A causes which condition?
A. Scurvy
B. Night blindness
C. Rickets
D. Anaemia
Correct Answer Is Option = Night blindness
Notes / Explanation
The deficiency of vitamin A in the diet causes the condition known as night blindness, in which a person has difficulty seeing in dim light or at night. Vitamins are substances that the body needs in small amounts in order to function properly and to stay healthy, and a lack of a particular vitamin can lead to a particular deficiency condition. Vitamin A is one of the important vitamins, and one of its important functions is connected with the eyes and the sense of sight, particularly the ability to see in dim light. When a person lacks enough vitamin A, one of the effects is night blindness, which means that the person is unable to see well in dim light or in the dark, or takes a long time for the eyes to adjust to low light, so that while they may see normally in good light, they have difficulty in seeing when the light is poor. This is one of the early effects of a lack of vitamin A, and a severe and prolonged deficiency of vitamin A can lead to more serious problems with the eyes and the sight, and can affect other aspects of health as well, since vitamin A is also important for the skin, for resistance to infection, and for other functions. Vitamin A is found in a number of foods, including certain foods of animal origin, and it can also be obtained from certain fruits and vegetables, particularly those that are yellow, orange or dark green in colour, such as carrots and certain leafy vegetables, which contain a substance that the body can convert into vitamin A. A diet including such foods provides the vitamin A that the body needs and helps to prevent night blindness and the other effects of a deficiency. The study of the vitamins, their sources and functions, and the conditions caused by their lack is a common and important topic. For PPSC and other competitive examinations, the key points to remember are that the deficiency of vitamin A causes the condition known as night blindness, in which a person has difficulty seeing in dim light or at night, that vitamin A is important for the eyes and the sense of sight, as well as for the skin and resistance to infection, and that it is found in certain foods of animal origin and in fruits and vegetables that are yellow, orange or dark green, such as carrots. This is a health-related topic, and anyone with concerns about their diet or health should seek advice from a qualified medical professional.
