Arrange the following events of coagulation in proper sequence. (1) prothrombin ? thrombin (2) fibrinogen ? fibrin (3) activation of factor XII (4) formation of prothrombinase
A. 4, 3, 1, 2
B. 2, 4, 3, 1
C. 3, 4, 1, 2
D. 3, 2, 4, 1
E. 1, 2, 3, 4
C
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