This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Miscellaneous, Subject name: Medicine
[{'content': 'What is the most likely diagnosis for this boy who was born at 36 weeks gestation weighing 1800 g? \nSelect and explain. \nA. Congenital parvovirus B19 infection, B. Fetal alcohol syndrome, C. Neonatal thyrotoxicosis, D. Nesidioblastosis', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Answer C. Neonatal thyrotoxicosisThe upper eyelids are retracted and subcutaneous fat is virtually absent, findings that are most consistent with a diagnosis of neonatal thyrotoxicosis. Mother and child recovered with treatment.', 'role': 'assistant'}]