Which one of the following is employed as a tranquilizer drug?

1. Promethazine

2. Valium

3. Naproxen

4. Mifepristone

Which of the following protein destroy the antigen when it enters in body cell?

1. Antibodies

2. Insulin

3. Chromoprotein

4. Phosphoprotein

Vitamin- B₁₂ contains

1. Zn (II)

2. Ca (II)

3. Fe (II)

4. Co (II)

Which one of the following vitamins is water-soluble?

1. Vitamin-B

2. Vitamin-E

3. Vitamin K

4. Vitamin A