Which one of the following ancient towns is well-known for its elaborate system of water harvesting and management by building a series of dams and channelizing water into connected reservoirs?

1. A

   Dholavira

   Dholavira. Dams, channels and connected reservoirs on the island city.

2. B

   Kalibangan

   Kalibangan. Ploughed field, fire altars — not this water grid.

3. C

   Rakhigarhi

   Rakhigarhi. Largest Harappan spread; not the textbook reservoir system.

4. D

   Ropar

   Ropar. A Sutlej site; not this hydraulic fame.

Summary. Official key is (a) Dholavira. The Harappan city in Kutch is known for an elaborate system of dams, drains and interlinked reservoirs.