Factor which activates prekallikrein -
Ans. is 'd' i.e., Factor XIIo Initiation of intrinsic coagulation pathway occurs when factor XII is exposed to negatively charged surfaceo This leads to activation of factor XII to XIIa.o Factor XIIa can then hydrolyze prekallikrein to kallikrein, which in turn activates more XII to XIIa.
Factor VIII
Factor II
Factor X
Factor XII
Blood: Hemostasis and Blood Coagulation