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
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 - 
Select and explain. 
A. 26/13, B. (26/13) x 1.41, C. Both, D. None
D: None
Answer: D: None 
Explanation: 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.