This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Medicine
[{'content': 'Postural ohostatic tachycardia syndrome is characterised by all except? \nSelect and explain. \nA. Women affected more commonly than men, B. Hea rate > 120/minute, C. Increase in hea rate > 30/minute when standing, D. Usually presents with ohostatic hypotension', 'role': 'user'}, {'content': "Answer: D \nExplanation: Postural ohostatic tachycardia syndrome (POTS) is characterised by symptomatic ohostatic intolerance without ohostatic hypotension that is associated with either hea rate of more than 120/minute or increase of >30/minute when standing that subside on sitting / lying down. The symptoms of ohostatic intolerance include lightheadedness, blurred vision, palpitation and nausea. Usually affects women more than men. This syndrome develops between 15 and 50 years of age. Reference: Harrison's Principles of Internal Medicine, 20th edition, p3164", 'role': 'assistant'}]