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
Level of hardness in soft water 
Select and explain. 
A. < 1meq/L, B. 1-3meq/L, C. 3-6meq/L, D. >6meq/L
A: < 1meq/L
Answer: A: < 1meq/L 
Explanation: Soft water: < 1 mEq/LModerately hard: 1-3 mEq/LHard water: 3-6 mEq/LVery hard water: >6 mEq/LPark 23e pg: 727