How should the main difference in the achievements of Evelyn and Bismillah Khan be understood?

Evelyn overcame a personal physical limit, while Bismillah gave prestige to a cultural instrument

The governing concept is comparison: the two artists share dedication but faced different kinds of challenges. Evelyn’s central achievement was personal and inspirational. Although her hearing became severely impaired, she developed an alternative way of experiencing rhythm and proved that disability need not end a musical career. Bismillah Khan’s achievement was chiefly cultural and artistic. He refined the shehnai, expanded its place beyond weddings and religious occasions, and established it as a respected classical instrument. Thus option A correctly identifies the difference without denying their common discipline. B is factually false about both instruments, while C and D ignore the musical careers that define the two accounts.

This is a Class 9 English question. Chapter: The Sound of Music. Topic: Overcoming physical disabilities (Evelyn Glennie) and the life of Shehnai maestro Ustad Bismillah Khan.