<prompt> Half life of prothrombin -24 hours60 hours5 days10 days  <response>: Ans. is b i.e., 60 hours o Half life of various clotting factors in hours :- Firinogen-100-150 Factor III-6 Factor X- 45-52 Prothrombin - 60 Factor VIII -8-12 Factor XI - 48-84 Factor V -24 Factor IX - 24 Factor XII - 150 WVF-30 