Concept:Ibn Battuta’s travelogue *Rihla* offers a firsthand account of the Delhi Sultanate under Sultan Muhammad Bin Tughlaq.
Explanation:Ibn Battuta was a Moroccan scholar who travelled to India in the 14th century.
He was drawn by the fame of Muhammad Bin Tughlaq as a generous patron of learning and culture.
The Sultan appointed him as *qazi* (judge) of Delhi, which allowed Ibn Battuta to observe court life closely.
Later, he fell out of favour and was imprisoned, but his experiences are recorded in his book *Rihla*.
*Rihla* is written in Arabic and documents the social, political, and cultural conditions of India during Tughlaq’s reign.
It provides a rich, first-hand insight into the administration, society, and events of that period.
The other travelogues listed belong to the later Mughal era, not to Tughlaq’s time.
Francois Bernier wrote about the Mughal court under Shah Jahan and Aurangzeb.
Niccolao Manucci’s *Storia do Mogor* also covers the later Mughal period.
Jean-Baptiste Tavernier travelled to India between 1605 and 1689, long after Muhammad Bin Tughlaq.
Therefore, among the options, only *Rihla* gives direct insight into his reign.
Answer:Ibn Battuta’s *Rihla* (Option A).