This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Endocrinology, Subject name: Medicine
[{'content': 'all of the following are features of thyrotoxicosis, except - \nSelect and explain. \nA. Diastolic murmur, B. tremors, C. Irregularly, irregular pulse, D. osteoporosis', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ref - Davidsons 23e p637', 'role': 'assistant'}]