Vitamins are essential for to occur. question 1 options:
a. oxidation
b. metabolism
c. fat storage
d. solubility

Vitamins are essential for B. METABOLISM  to occur

Vitamin A is for your eyesight. It makes you see clearly. It also helps you fight infection by boosting your immune system.

Vitamin B (B1, B2, B6, B12, niacin, folic acid, biotin, and pantothenic acid) are important for metabolism. It helps make energy and releases said energy when your body needs it. It also helps in making red blood cells. 

Vitamin C helps you resist infection and helps keep your body tissues in good shape.

Vitamin D strengthens your bones and teeth.

Vitamin E protects your cells and tissues from damage. 

Vitamin K enables your blood to clot and stops your bleeding when you're injured.

Can you list the drugs that you want answered for? i think maybe your answer could be a or b. but i’ll never know till you post the rest of this question.