What is common to the places known as Aliyar, Isapur and Kangsabati?

Aliyar (Tamil Nadu), Isapur (Maharashtra), and Kangsabati (West Bengal) are all locations of major dams and river valley projects that serve as vital water reservoirs for irrigation and hydroelectric power. While option (a) is a common distractor for geographical sites in India, these specific locations have no documented uranium deposits, which are instead found in regions like Jaduguda or Tummalapalle. The core concept being tested is the geographical identification and mapping of major multipurpose irrigation projects across different Indian states.