Which emperor was so happy with the sermon of a preacher named Nasiruddin that he gave him "a hundred thousand tankas (coins) and two hundred slaves"?

Muhammad bin Tughlaq

The correct answer is Option (2) → Muhammad bin Tughlaq

Travellers who left written accounts were generally men who were interested in and sometimes intrigued by the condition of women in the subcontinent. Sometimes they took social inequities for granted as a “natural” state of affairs. For instance, slaves were openly sold in markets, like any other commodity, and were regularly exchanged as gifts. When Ibn Battuta reached Sind he purchased “horses, camels and slaves” as gifts for Sultan Muhammad bin Tughlaq. When he reached Multan, he presented the governor with, “a slave and horse together with raisins and almonds”. Muhammad bin Tughlaq, informs Ibn Battuta, was so happy with the sermon of a preacher named Nasiruddin that he gave him “a hundred thousand tankas (coins) and two hundred slaves”.