Which of the following vitamins is also called pyridoxine?

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.

Which of the following statements is incorrect?

Identify the correct set from the following:

Xerophthalmia disease is caused by the deficiency of

From the vitamins $A, B_1, B_6, B_{12}, C, D, E$ and $K$,the number of vitamins that can be stored in our body is............