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)

Enzymes take part in a reaction and

1. decrease the rate of a chemical reaction

2. increase the rate of a chemical reaction

3. Both 1 and 2

4. None of the above

Which one of the following vitamins is water-soluble?

1. Vitamin-B

2. Vitamin-E

3. Vitamin K

4. Vitamin A