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
The quantity of water considered adequate in urban areas (in liters per day person) is - 
Select and explain. 
A. 50-100, B. 100-150, C. 150-200, D. 200-250
C: 150-200
Answer: C: 150-200 
Explanation: A daily supply of 150-200 litres per capita is considered adequate to meet the needs for urban domestic purposes. But again it depends on the climate, standard of living and habits of people. Park's Textbook of Preventive and Social Medicine, 25th edition, Page No. 766