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      Question

      Which vitamin deficiency is most directly associated

      with night blindness in humans?
      A Vitamin C Correct Answer Incorrect Answer
      B Vitamin D Correct Answer Incorrect Answer
      C Vitamin A Correct Answer Incorrect Answer
      D Vitamin K Correct Answer Incorrect Answer

      Solution

      Night blindness, or difficulty seeing in low light conditions, is most directly associated with a deficiency of vitamin A. Vitamin A is essential for the formation of visual pigments in the retina, particularly rhodopsin, which is found in rod cells that function in dim light.  Foods rich in vitamin A are such as liver, eggs, milk, and beta-carotene–rich vegetables like carrots and spinach, help prevent this condition.

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