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 color code of plastic bag for disposing microbial laboratory culture waste – \nSelect and explain. \nA. Black, B. Red, C. Blue, D. White', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Microbial laboratory culture wastes are category No. 3.\nCategory 3 wastes have color code Yellow or red.\nWastes discarded in yellow bag are : (i) Category 1 (Human anatomical waste), (ii) Category 2 (Animal waste), (iii) Category 3 (Microbiology and Biotechnology waste), and (iv) Category 6 (Solid waste).', 'role': 'assistant'}]