The correct answer is (c). The Nagarjuna Sagar Dam is located on the Krishna River in the Indian state of Andhra Pradesh. It is the second largest dam in India by volume of water impounded, after the Indira Sagar Dam. The dam was built between 1955 and 1969 and is primarily used for irrigation, flood control, and hydroelectric power generation.
The Godavari River is the longest river in India, flowing through the states of Maharashtra, Telangana, Andhra Pradesh, Karnataka, and Odisha. The Kaveri River is the second longest river in India, flowing through the states of Karnataka, Tamil Nadu, and Kerala. The Narmada River is the third longest river in India, flowing through the states of Madhya Pradesh, Gujarat, and Rajasthan.
The Godavari, Kaveri, and Narmada rivers are all important rivers in India, and they are all used for a variety of purposes, including irrigation, flood control, and hydroelectric power generation. However, the Nagarjuna Sagar Dam is located on the Krishna River, not on the Godavari, Kaveri, or Narmada rivers.