Which of the following substances if introduced into the blood stream would case coagulation at the site of its introduction

Options

(a) fibrinogen
(b) prothrombin
(c) heparin
(d) thromboplastin

Correct Answer:

thromboplastin

Explanation:

When thromboplastin is injected into the blood, it will cause blood clotting due to the formation of Prothrombokinase.