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: Pediatrics
[{'content': 'Which of the following is the late toxic manifestation of diphtheria in child? \nSelect and explain. \nA. Renal failure, B. Myocarditis, C. v, D. Septicemia', 'role': 'user'}, {'content': "Answer: B \nExplanation: Polyneuropathy and myocarditis are late toxic manifestations of diphtheria. Myocarditis is typically associated with dysrhythmia of the conduction tract and dilated cardiomyopathy. Other complications of diphtheria include pneumonia, renal failure, encephalitis, cerebral infarction, and pulmonary embolism. Neurologic manifestations may appear during the first or second week of illness, typically beginning with dysphagia and nasal dysahria and progressing to other signs of cranial nerve involvement, including weakness of the tongue and facial numbness. Ref: Bishai W.R., Murphy J.R. (2012). Chapter 138. Diphtheria and Other Infections Caused by Corynebacteria and Related Species. In D.L. Longo, A.S. Fauci, D.L. Kasper, S.L. Hauser, J.L. Jameson, J. Loscalzo (Eds), Harrison's Principles of Internal Medicine, 18e", 'role': 'assistant'}]