Vitamin $A$ is present in

Which of the following statements are correct?
$a$. Deficiency of vitamin $K$ results in increased blood clotting time.
$b$. The sources of vitamin $B_2$ are milk and liver.
$c$. Hexapeptide has six peptide bonds.
$d$. Improper functioning of adrenal cortex results in hypoglycemia.

The vitamin which is water-soluble and acts as an antioxidant is:

The deficiency of vitamin $C$ causes

Identify the correct set from the following:

From the following,the number of fat-soluble and water-soluble vitamins respectively are $A, D, C, B_1, K, B_6$.