Explanation:

Barani was a Muslim political thinker of the Delhi Sultanate located inp resent-day North India during Muhammad bin Tughlaq and Firuz Shah's reign.
The Fatwa-i-Jahandari is a work containing the political ideals to be pursued by a Muslim ruler in order to earn religious merit and the gratitude of his subjects.
He was best known for composing the Tarikh-i-Firuz Shahi,a work on medieval India,which covers the period fromthe reign of Ghiyasuddin Balban tothe first six years of reign of Firuz Shah Tughluq and the Fatwa-i-Jahandari which details the caste system among Muslims in South Asia.