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': 'True about Cholera -a) Food can transmit cholerab) Vaccination gives 90% efficiencyc) Healthy carrier can transmit cholerad) Chlorination is not effective \nSelect and explain. \nA. ac, B. bc, C. ad, D. b', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Cholera is transmitted by contaminated water & food, direct contact through finger from carriers\nAbout Other Options:\n\nOption b: Vaccination gives protection rate of 50–60% ………………. Ananthanarayan 9/e p311\nOption d: Chlorination is effective. ‘In rural area, water can be made safe from cholera bacilli by boiling or chlorination’', 'role': 'assistant'}]