Which sequence is correct for the following events? 1. fibrinogen → fibrin 2. clot retraction 3. formation of thromboplastin 4. prothrombin → thrombin
1) 1, 2, 3, 4
2) 4, 3, 2, 1
3) 2, 3, 4, 1
4) 3, 1, 4, 2