If V is total consumption of water in litres for a population of N individuals, per capita consumption or water allowance for the water supply Q, is given by

• A. <img src="/_files/images/civil-engineering/water-supply-engineering/217-10.206-1.png">
• B. <img src="/_files/images/civil-engineering/water-supply-engineering/217-10.206-2.png">
• C. <img src="/_files/images/civil-engineering/water-supply-engineering/217-10.206-3u.png">
• D. none of these.