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
[{'content': 'Prothrombin time (PT) of a patient is 26, control PT is 13 seconds and sensitivity index is 1.41. What will be the INR of this patient - \nSelect and explain. \nA. 26/13, B. (26/13) x 1.41, C. Both, D. None', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Ans. is d None o A standardized system called the International Normalized Ratio (INR), which is the ratio of prothrombin time in patient to that in normal non-anticoagulated person, has been developed by WHO and it is based on the use of human brain thromboplastin.', 'role': 'assistant'}]