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Question

The vitamin, which is generally may be excreted in urine by humans, is
  1. Vitamin C
  2. Vitamin K
  3. Vitamin A
  4. Vitamin E

A
Vitamin C
B
Vitamin K
C
Vitamin A
D
Vitamin E
Solution
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The two major classes of vitamins are fat soluble and water soluble. Vitamin C and all of the B vitamins - thiamine, riboflavin, niacin, vitamin B6, folate, vitamin B12, biotin and pantothenic acid share similar characteristics because they are all water soluble. The body has a limited ability to store these vitamins so they need to be continuously replenished by the diet. Water-soluble vitamins are absorbed by the digestive tract into the bloodstream, metabolized and then excreted by the kidneys in the urine. Therefore, the correct answer is option A.

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