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: Unknown
[{'content': 'Level of Hardness if the value is 50-150 mg/L - \nSelect and explain. \nA. Soft water, B. Moderately hard water, C. Hard water, D. Very hard water', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., Moderately hard water Classification of hardness in water Classification Level of hardness (mEq./litre) a) Soft water b) Moderately hard c) Hard water d) Very hard water Less than 1 (< 50 mg/L) 1 - 3 (50 - 150 mg/L) 3 -6(150 - 300 mg/L) Over 6 (> 300 mg/L)", 'role': 'assistant'}]