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: Microbiology
[{'content': 'All of the following are true about diphtheria except: \nSelect and explain. \nA. Faucial diphtheria is more dangerous than laryngeal diptheria, B. Laryngeal diphtheria mandates tracheostomy, C. Child is infectious with faucial diphtheria, D. Myocarditis may be a complication', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Diphtheria:\n\nCausative agent – Corynebacterium diphtheriae (Gram +ve bacillus)\nIncubation period: 2 - 6 days.\nDepending on site present as:\n\n– Nasal diphtheria - Mildest, toxemia is minimal.\n– Faucial diphtheria (most common) = Nasopharyngeal diphtheria - More severe than nasal diphtheria.\n– Laryngotracheal diphtheria - Most severe, maximum obstructive symptom, tracheostomy may be essential.\n\nComplications :\n\n– Myocarditis - Occurs towards the end of 1st or begining of 2nd week.\n– Peripheral neuropathy of descending type.\n– Renal failure.\nRemember : Cardiac damage is permanent, while recovery of nerve damage is rule.', 'role': 'assistant'}]