This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Communicable Diseases, Subject name: Social & Preventive Medicine
[{'content': 'Clinical features of Botulism are all EXCEPT: \nSelect and explain. \nA. Diarrhoea, B. Constipation, C. Ocular nerve paralysis, D. Blurring of vision', 'role': 'user'}, {'content': 'Answer: A \nExplanation: (Diarrhoea): Ref: 843-H, (211- Park 20th)BOTULISM - Clostridium botulinum (Incubation period 12-36 hours)Clinical symptoms* Cranial nerve involvement - diplopia, dysarthria, dysphonia or dysphagia weakness is asymmetric and progresses* Dizziness, blurred vision, dry mouth sore throat* Alert and oriented, may be drowsy, agitated and anxious.* Nausea vomiting and abdominal pain* Ptosis, papillary reflexes may be depressed, and fixed or dilated pupils are noted in half the patients* Paralytic ileus, severe constipation and urinary retension are common* Typically they have no feverInfant-Botulism: identification of contaminated honey as one source of spores has led to the recommendation that honey not be fed to children < 12 months of age.', 'role': 'assistant'}]