This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: general microbiology, Subject name: Microbiology
[{'content': 'Specific reason to disallow the sample for culture - \nSelect and explain. \nA. Sample brought within 2 hr of collection, B. Sample brought in sterile plastic container, C. Sample brought in formalin, D. Sample obtained after cleaning the collection site', 'role': 'user'}, {'content': "Answer: C \nExplanation: Sample brought in formalin are not allowed for culture,as it may loose it's characteristic propeies specific to that organism. Ref ananthnarayana and panikers microbiology textbook", 'role': 'assistant'}]