The correct option is D Shillong, Meghalaya
Rooftop rainwater harvesting is the most
common practice in Shillong, Meghalaya.
It is interesting because Cherapunjee and
Mawsynram situated at a distance of
55 km. from Shillong receive the highest
rainfall in the world, yet the state capital
Shillong faces acute shortage of water.
Nearly every household in the city has a
rooftop rainwater harvesting structure.
Nearly 15-25 per cent of the total water
requirement of the household comes from
rooftop water harvesting.