pakistank2:

The Benjamin Sisters were a Pakistani singing group of three sisters, Nerissa, Beena and Shabana Benjamin. Usually chorus-singing together in appearances on Pakistan Television in the late 1970s and early 1980s, they achieved immense popularity in Pakistan in what began to be referred to as the Benjamin Sisters Phenomenon.

Benjamin Sisters first participated in various music learning programs aired on Pakistan Television from 1968 to 1987. These programs were conducted by Sohail Rana; a prominent music director of Pakistan, and they were aimed at educating children about music. The three sang in a synchronized way, in a “single voice.” The famous of which they sang the patriotic National song of Pakistan known as the Is parcham kay saye tale hum ek hai.