Thiamine is

Which of the following vitamins should be regularly supplied in the diet?

Match the vitamins in List-$I$ with their sources in List-$II$.

List-$I$	List-$II$
$A$. Vitamin $A$	$I$. Meat
$B$. Vitamin $B_{12}$	$II$. Sunflower oil
$C$. Vitamin $E$	$III$. Green leafy vegetables
$D$. Vitamin $K$	$IV$. Carrots

Choose the correct answer from the options given below.

Which among the following acts as a vitamin?

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.

Vitamin $C$ is