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': 'Which is cholera vaccine - \nSelect and explain. \nA. Ty21 A, B. HGD - 103, C. WC-rBS, D. None', 'role': 'user'}, {'content': 'Answer: C \nExplanation: <p> Dukoral(WC-rBS) is one of the oral cholera vaccine. Park&;s textbook of preventive and social medicine,K.Park,23rd edition,page no:233 <\\p>', 'role': 'assistant'}]