Vitamin A_____________?
Correct answer: D. Deficiency causes impaired vision
- A. Is water soluble
- B. Is required for formation of clotting factors
- C. Maintains normal plasma calcium levels
- D. Deficiency causes impaired vision
Explanation
Vitamin A is required for rhodopsin formation in the retina, so its deficiency causes night blindness and impaired vision. Plasma calcium regulation is mainly associated with vitamin D, while clotting-factor formation depends on vitamin K.
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