Which of the following acids is a vitamin?

Which of the following vitamins has isoprene units in its structure?

Which of the following diseases occurs due to the deficiency of pyridoxine?

Which of the following $B$ group vitamins can be stored in our body?

Match the $LIST$-$I$ with $LIST$-$II$:

$LIST$-$I$ (Deficiency Disease)	$LIST$-$II$ (Vitamin)
$A$. Scurvy	$I$. Vitamin $B_6$
$B$. Convulsions	$II$. Vitamin $A$
$C$. Cheilosis	$III$. Vitamin $C$
$D$. Xerophthalmia	$IV$. Vitamin $B_2$

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............