Continuous bleeding from an injured part of the body is due to a deficiency of:

1. Vitamin -A

2. Vitamin - B

3. Vitamin - K

4. Vitamin - E

Which of the following substances, if introduced into the bloodstream, would cause coagulation of blood at the site of its introduction?

1. Thromboplastin

2. Fibrinogen

3. Heparin

4. Prothrombin