This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Parasympathetic System & Glaucoma, Subject name: Pharmacology
[{'content': 'Several children at a summer camp were hospitalized with symptoms thought to be due to ingestion of food containing botulinum toxin. The effects of botulinum toxin are likely to include: \nSelect and explain. \nA. Bronchospasm, B. Cycloplegia, C. Diarrhea, D. Skeletal muscle spasms', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Botulinum toxin interferes with the release of ACh and thus acts as a parasympatholytic agent. Bronchospasm and diarrhoea are the symptoms of muscarinic stimulation whereas muscle spasms may be seen on nicotinic stimulation. Cholinergic drugs cause cyclospasm whereas anticholinergics result in cycloplegia.', 'role': 'assistant'}]