Question

The vitamin which is neither soluble in water nor in fat is
A.Biotin
B.Phylloquinone
C.Thiamine
D.Pyridoxine

Answer 1

Hint: There are mainly two classes of vitamins based on their solubility in water or fat. However there are some exceptions to this classification. By examining the solubility of each option, we will be able to find the vitamin which is neither soluble in water nor fat.

Complete answer:
The organic compounds required in the diet in small quantities to perform biological functions for normal maintenance and growth of living organisms are called vitamins. These are designated by alphabets. Vitamins are classified into two groups depending on their solubility in fat or water-
(a) Fat-soluble vitamins: Vitamins which are soluble in fats or oils but not soluble in water come into this category. These are the vitamins A, D, E and K. In the body they are stored in liver and adipose tissue.
(b) Water-soluble vitamins: These are soluble in water but insoluble in oils or fats. These are vitamin B and C. These vitamins need to be supplied regularly to the body as these being water-soluble cannot be stored excess in the body.
Now let us look at the given options :
-Biotin is also known as vitamin H. When we look into the solubility of this vitamin, it is neither a water-soluble nor a fat-soluble vitamin. So this option is correct. Now, let us look into the structure of biotin;

-Phylloquinone is known as vitamin K. It is a fat-soluble vitamin. It is commonly found in green plants. It is required for blood-clotting.
-Thiamine is also known as vitamin ${B_1}$ . It is a water-soluble B vitamin.
-Pyridoxine is a form of vitamin ${B_6}$ . It is a water-soluble vitamin.
The correct option is A.

Note:Most of the vitamins cannot be synthesized in the body but plants can synthesize almost all of them. Biotin is also known as vitamin H. Biotin helps to convert nutrients into energy. It is required for healthy hairs, nails and skin.