Anticoagulant not used in vitro is -: (A) Heparin, (B) Warfarin, (C) Oxalate, (D) Citrate
Answer is B. Ans. is 'b' i.e., Warfarin o Oral anticoagulants have only in vivo action (not in vitro). o Heparin is used both in vivo and in vitro. o Oxalate and citrate are used in vivo.