MCQ Detailed View

Vitamins are essential organic compounds required in small amounts to support various biochemical processes in the human body. They are classified into two main groups based on solubility:

1. 
   

   Fat-soluble vitamins: These dissolve in fats and are stored in body tissues. Examples include Vitamin A, D, E, and K.

   
   


2. 
   

   Water-soluble vitamins: These dissolve in water and are not stored in significant amounts in the body. They need to be replenished regularly through diet. Examples include Vitamin B-complex (B1, B2, B3, B6, B12, folic acid, biotin, pantothenic acid) and Vitamin C.

   
   

Looking at the given options:

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  Vitamin A: Fat-soluble, stored in the liver, important for vision and immune health.

  
  


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  Vitamin D: Fat-soluble, helps in calcium absorption and bone health.

  
  


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  Vitamin K: Fat-soluble, plays a role in blood clotting and bone metabolism.

  
  


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  None: This is the correct choice because none of the listed options are water-soluble vitamins. The actual water-soluble vitamins are mainly from the B group and Vitamin C, which are easily excreted through urine when consumed in excess.

  
  

Water-soluble vitamins are particularly important because the body does not store them for long periods. A deficiency can quickly lead to health problems such as scurvy (Vitamin C deficiency) or beriberi (Vitamin B1 deficiency). Conversely, fat-soluble vitamins can accumulate to toxic levels if taken in excessive amounts.

Thus, the correct answer is None, as all the vitamins listed in the options are fat-soluble, not water-soluble. The main water-soluble vitamins are Vitamin B-complex and Vitamin C.