This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Diseases of Thyroid, Subject name: Medicine
[{'content': 'The most common symptom of thyrotoxicosis is? \nSelect and explain. \nA. Palpitation, B. Fatigue and weakness, C. Diarrhea, D. Hyperactivity and irritability', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Clinical feature of thyrotoxicosis: Hyperactivity, Irritability and dysphoria ( m/c symptom) Heat intolerance Dairrhea Weight loss Tachycardia ( persists during sleep ) Hypeension Fine resting tremor Proptosis Warm sweaty skin Irregular menses Osteoporosis Proximal myopathy', 'role': 'assistant'}]