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': 'All of the followings are true about Safe and wholesome water, except: \nSelect and explain. \nA. It is free from color and odor, B. Free from pathogenic agents, C. It is unusable for domestic purpose, D. Free from harmful chemical pathogens.', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ans. c. It is unusable for domestic purposeSAFE AND WHOLESOME WATERIt is defined as water that is:Free from pathogenic agentsPleasant to taste (free from color and odor).Free from harmful chemical pathogensUsable for domestic purpose', 'role': 'assistant'}]