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: Social & Preventive Medicine
Not a feature of hard water is 
Select and explain. 
A. Increased fuel consumption, B. Erosion of lead pipe, C. Scaling of boiler, D. Decreased soap consumption
D: Decreased soap consumption
Answer: D: Decreased soap consumption 
Explanation: None