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: Social & Preventive Medicine
[{'content': 'The type of Diphtheria with highest mortality is \nSelect and explain. \nA. Pharyngeal, B. Nasal, C. Laryngeal, D. Conjuntival', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Clinical manifestations of diphtheria \n1. Faucial (tonsillo pharyngeal) diphtheria\n\nIt is the commonest type of diphtherial infection.\nIncubation period is 2-5 days.\nPatients present with malaise, sore throat and moderate fever.\nA thick adherent pseudomnembrane (gray or white) is present on one or both tonsils or adjacent pharynx.\nDislodging the membrane is likely to cause bleeding.\nA small percentage of patients present with massive swelling of the tonsils and uvula with cervical lymphadenopathy (bull neck) and severe toxemia → Malignant diphtheria.\nSystemic toxicity (toxemia) is usually most severe when pseudomembrane extends from tonsil and pharynx (faucial diphtheria) to adjacent areas.\n\n2. Laryngeal diphtheria\n\nPresents as hoarseness and cough.\nIt is the most severe form of respiratory diphtheria.\nTrocheostomy may be required.\n\n3.Nasal diphtheria\n\nPresents with unilateral or bilateral nasal discharge.\nMildest form of respiratory diphtheria\n\n4. Cutaneous diphtheria\n\nCaused by nontoxigenic strains\nPresents as distinct "punched out" ulcers.\nMore common in tropical areas.\nOther less common type of diphtheria are conjunctiva, otitic, genital - (vulval, vaginal or prepucial), gastrointestinal.', 'role': 'assistant'}]