Identify the earliest established hydroelectric power project in Pakistan.
Explanation
Among the listed projects, Malakand Dargai is recognized as Pakistan's oldest hydroelectric power initiative, predating Mangla, Tarbela, and Warsak projects.
Among the listed projects, Malakand Dargai is recognized as Pakistan's oldest hydroelectric power initiative, predating Mangla, Tarbela, and Warsak projects.