This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Bacteria, Subject name: Microbiology
[{'content': 'Characteristic of Bacillus cereus food poisoning is: \nSelect and explain. \nA. Presence of fever, B. Presence of abdominal pain, C. Absence of vomiting, D. Absence of diarrhoea', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., Presence of abdominal painBacillus cereus food poisoning is of two types. Emetic type and Diarrheal type. Abdominal cramps are common feature in both. Other features are:(a) Emetic Type: History of intake of fried rice from Chinese restaurant 6 hours earlier. Mediated by enterotoxin resembling Staphylococcal Enterotoxin.(b) Diarrhoeal Type: History of intake of cooked meat and vegetables 8-16 hours earlier. Mediated by enterotoxin resembling E. coli.", 'role': 'assistant'}]