This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Hospital waste and disaster management, Occupational health, Subject name: Social & Preventive Medicine
[{'content': 'Category 4 and 7 treated by \nSelect and explain. \nA. Incineration, B. Autoclaving, C. Deep burial, D. Disposal in landfill', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Color codingType of containerWaste categoryTreatment optionsYellowPlastic bagCat 1, 2, 3 & 6Incineration/deep burialRedDisinfected container/plastic bagCat 3, 6 & 7Autoclaving/Microwaving/Chemical treatmentBlue/White translucentPlastic bag/Puncture proof containerCat 4 & 7Autoclaving/Microwaving/Chemical treatment and Destruction/ShreddingBlackPlastic bagCat 5, 9 & 10 Disposal in secured landfillRef: Park; 23rd ed; Pg 794', 'role': 'assistant'}]