This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Anticoagulants and Coagulants, Subject name: Pharmacology
A PTT is required for monitoring of - 
Select and explain. 
A. Streptokinase, B. Warfarin, C. Heparin, D. Tranexamicacid
C: Heparin
Answer: C: Heparin 
Explanation: Ans. is 'c' i.e., Heparin o Monitoring of unfractionated heparin - aPTTo Monitoring of oral anticoagulants - PT/INRo Monitoring of LMW heparins - No monitoring required