Final answer:
The correct sequence is: Fibrinogen ? Fibrin, Formation of thromboplastin, Prothrombin ? Thrombin, Clot retraction.
Step-by-step explanation:
The correct sequence for the events mentioned is:
- Fibrinogen ? Fibrin
- Formation of thromboplastin
- Prothrombin ? Thrombin
- Clot retraction
In the process of coagulation, fibrinogen is converted to fibrin, which forms a mesh to trap platelets and erythrocytes and produce a clot. Thromboplastin is then formed, followed by the conversion of prothrombin to thrombin. Finally, the clot retracts to tighten the clot and expel serum.