The correct option is A Mahmud Ghaznavi
Mahmud brought whole libraries from Ray and Isfahan to Ghazni. He even demanded that the Khwarizmshah court send its men of learning to Ghazni. Mahmud patronized the notable poet Firdausi, who after labouring 27 years, went to Ghazni and presented the Shahnameh to him. Nothing is chronicled about the court poets of the other two kings, hence, incorrect.