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': 'Presumptive count includes \nSelect and explain. \nA. No E. Coli, B. Coliform but not only E., C. Gram negative bacilli, D. Any bacteria', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Presumptive coliform test\n\nIn presumptive coliform test the most probable number of all coliform organisms (not only E.coh) are counted → Presumptive coliform count.\n\nThe methods are : -\n\nMultiple tube method\nMembrane filtration technique.\n\n\nAfter analysing presumptive coliforrn count, E.coli count is confirmed by other tests, e.g., by Eijkman test or indole production..', 'role': 'assistant'}]