The correct answer is (c) Urdu.
Urdu is a hybrid language that developed in the 16th century in the northern Indian subcontinent, from a mixture of Persian, Arabic, Turkish, and several Indian languages. It was originally used as a lingua franca among the Mughal court and the military, but it gradually became the language of administration and education in the Mughal Empire.
Arabic is a Semitic language that was first spoken in the Arabian Peninsula. It is the liturgical language of Islam and the official language of 26 countries. Arabic was the language of the Mughal court in the early years of the empire, but it was gradually replaced by Urdu.
Persian is an Indo-Iranian language that was first spoken in Iran. It was the language of the Mughal court from the 16th to the 18th centuries. Persian was used in government and education, and it was also the language of literature and poetry.
Hindi is an Indo-Aryan language that is spoken in India and Nepal. It is the official language of India and the second most spoken language in the world. Hindi was not widely spoken in the Mughal Empire, but it gradually became more popular in the 19th century.