Who was the first Prime Minister of Pakistan, Who Sought a voluntary vote of confidence from the Parliament ?

Who was the first Prime Minister of Pakistan, Who Sought a voluntary vote of confidence from the Parliament ?

A. Imran Khan
B. Nawaz Sharif
C. Yousaf Raza Gillani
D. None of these

Nawaz Sharif was the first prime minister who sought a voluntary vote of confidence from the Parliament after his reinstatement was granted by the Supreme Court in 1993.