How are vitamins classified? Name the vitamin responsible for the coagulation of blood.

Vitamins can be defined as the essential dietary factors required by an organism in minute quantities and whose absence causes specific deficiency diseases. Vitamins are broadly classified into two types:-

(i)Fat-soluble vitamins:

These are oily substances not readily soluble in water. These include vitamins A, D , E and K.

(ii)Water-soluble vitamins:-

Vitamins that are soluble in water belong to this group. For example :B group vitamins (B1 ,B2 ,B6, B12 ,etc.) and vitamin C. 

Vitamin K is responsible for the coagulation of blood.

Vitamin H (Biotin) as an exception, it is neither soluble in water nor in fat