Xerophthalmia disease is caused by the deficiency of

Which of the following is not correct?

Which is a plant growth inhibitor?

The metal ion present in vitamin $B_{12}$ is

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.

Among the following vitamins,the one whose deficiency causes rickets (bone deficiency) is: