Question: Ahmad Niyaltigin was the treasurer of a sultan who rose to power by seizing what from his younger twin?
Sentence (from "Mas'ud I of Ghazni"): Mas'ud I of Ghazni (Persian: مسعود غزنوی‎ ‎ ), known as Amīr-i Shahīd (امیر شهید ; "the martyr king")(998 – 17 January 1040), was "sultan" of the Ghaznavid Empire from 1030 to 1040.
Relevant evidence: Yes