In Vijayanagara, water from which one of the following structures was conducted through the channel to the "royal centre"?

Kamalapuram tank

The correct answer is Option (4) → Kamalapuram tank

"The most striking feature about the location of Vijayanagara is the natural basin formed by the river Tungabhadra which flows in a north-easterly direction. The surrounding landscape is characterised by stunning granite hills that seem to form a girdle around the city. A number of streams flow down to the river from these rocky outcrops. In almost all cases embankments were built along these streams to create reservoirs of varying sizes. As this is one of the most arid zones of the peninsula, elaborate arrangements had to be made to store rainwater and conduct it to the city. The most important such tank was built in the early years of the fifteenth century and is now called Kamalapuram tank. Water from this tank not only irrigated fields nearby but was also conducted through a channel to the “royal centre”".