Largest dam of Pakistan is ?

A. Tarbela Dam

Here's why:

Tarbela Dam is the world's largest earth-filled dam and the second-largest by structural volume. It's located on the Indus River in Khyber Pakhtunkhwa province.

Mangla Dam is another major dam in Pakistan, but it's smaller than Tarbela Dam.

Warsak Dam is a much smaller dam compared to Tarbela and Mangla.