Correct Answer: (a) Alptigin
Solution:Towards the end of the ninth century, Trans-oxiana, Khurasan and parts of Iran were being ruled by the Samanids who were Iranian by descent. Among the Samanid governor there was a Turkish Slave, Alaptigin, who, in course of time, established an independent kingdom with its capital at Ghazni and founded Ghaznavid dynasty, which soon took over the control of Samanid Kingdom.