This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Environment and Health, Subject name: Social & Preventive Medicine
[{'content': 'Sullage is - \nSelect and explain. \nA. Liquid excreta, B. By product of chemical industry, C. Waste wrater from kitchen, D. Waste water from an industry', 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. is 'c' i.e., Waste water from kitchen o Sewage - Waste water from a community, containing solid and liquid excreta, derived from houses, street and yard wasting, factories and industries.o Sullage - Wast water which does not contain human excreta, e.g., waste water from kitchen and bathrooms.o Sludge - Semisolid residual material left from treatment of sewage or from industries.", 'role': 'assistant'}]