The correct answer is: B. Persian
Persian was the court language of the Delhi Sultanate. It was used in official documents, literature, and courtly speech. The Delhi Sultanate was a Muslim empire that ruled over much of northern India from the 12th to the 16th centuries. The sultans were of Turkic origin, and they brought Persian with them when they conquered India. Persian became the language of the ruling class, and it was used to communicate with the local Hindu population. It was also the language of literature and scholarship.
Urdu is a later development, and it is a mixture of Persian, Arabic, and Hindi. It was developed in the 16th century by the Mughals, who were another Muslim empire that ruled over India. Hindi is a modern language that developed from Sanskrit. It is the most widely spoken language in India today. Arabic is a Semitic language that is spoken in the Middle East. It is the language of the Quran, and it is the official language of many Muslim countries.
Persian was a very important language in the Delhi Sultanate. It was used in official documents, literature, and courtly speech. It was also the language of the ruling class, and it was used to communicate with the local Hindu population. Persian was a very important part of the culture of the Delhi Sultanate.