The correct answer is option 3: Mehr-un-Nissa.
Nur Jahan, who was known for her influence in the Mughal Empire during the 17th century, was originally named Mehr-un-Nissa. She was born in 1577 and later married Emperor Jahangir. After their marriage, she became more commonly known as Nur Jahan, a name given to her by Emperor Jahangir himself, which means "Light of the World". Nur Jahan was an influential and powerful figure during her time, and she played a significant role in shaping the political landscape of the Mughal Empire. She was known for her intelligence, political genius, and artistic talents. Overall, Mehr-un-Nissa was her original name before she became famous as Nur Jahan.