Ruler of Sindh defeated by Muhammad-bin-Qasim?

The question identifies the ruler of Sindh defeated by Muhammad-bin-Qasim. The correct answer is Raja Dahir. Raja Dahir was the last Hindu king of the Brahmin dynasty ruling Sindh when Muhammad bin Qasim led the Umayyad invasion in 712 CE. His defeat marked the beginning of Islamic rule in the Indian subcontinent, a foundational event in South Asian history. Distractor Bijai Raj is not recognized as the primary ruler of Sindh defeated by Muhammad bin Qasim. Jaipal was a Shahi ruler of Punjab who fought against Mahmud of Ghazni much later, in the late 10th and early 11th centuries, not Muhammad bin Qasim. Similarly, Anand Pal was Jaipal's son and also confronted Mahmud of Ghazni, making him an incorrect choice for this earlier historical event. Raja Dahir is historically confirmed as the ruler defeated.