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: Social & Preventive Medicine
[{'content': 'The amount of bleaching powder necessary to disinfect choleric stools, is - \nSelect and explain. \nA. 50 gm/lit, B. 75 gm/lit, C. 90 gm/lit, D. 100 gm/lit', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]