This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pharmacology
Heparin therapy should be monitored with intermittent estimation of- 
Select and explain. 
A. Bleeding time, B. Prothrombin time, C. PTTK, D. All of the above
C: PTTK
Answer: C: PTTK 
Explanation: Ans. is 'c' i.e., PTTK o Monitoring of unfractionated heparin --> aPTT o Monitoring of oral anticoagulants-* PT/INR o Monitoring of LMW heparins --> No monitoring required