The correct answer is (d) Tamil Nadu.
The Mullaperiyar Dam is a masonry dam on the Periyar River in the Indian state of Kerala. It was constructed between 1887 and 1895 by the British government. The dam is located in the Idukki district of Kerala, about 100 kilometers (62 mi) from the state capital, Thiruvananthapuram.
The dam is 136 meters (446 ft) high and 365 meters (1,201 ft) long. It has a storage capacity of 13.5 billion cubic meters (470 billion cubic feet) of water. The dam is used for irrigation, drinking water supply, and hydroelectric power generation.
The Mullaperiyar Dam has been the subject of a dispute between Kerala and Tamil Nadu for many years. Kerala has been demanding that the dam be decommissioned, citing safety concerns. Tamil Nadu has opposed this demand, arguing that the dam is essential for its water supply and power generation.
In 2014, the Supreme Court of India ruled that the dam was safe and that it could continue to be operated. However, the court also ordered that the dam be inspected every year by a panel of experts.
The Mullaperiyar Dam is a controversial issue, but it is also an important part of the water infrastructure of Kerala and Tamil Nadu.