Explanation:

- Option 1: Taj Mahal

- Built by Emperor Shah Jahan in memory of his wife, Mumtaz Mahal. It's not associated with Aurangzeb.

- Option 2: Bibi Ka Maqbara

- Built by Aurangzeb's son, Azam Shah, in memory of his mother, Dilras Banu Begum. Often compared to the Taj Mahal due to its design.

- Option 3: Rani Ki Vav

- An intricately constructed stepwell located in Gujarat, India, not a Mughal monument. Built by Rani Udayamati in memory of her husband, King Bhimdev I.

- Option 4: Bibi Tomb

- There’s no widely recognized monument by this name associated with Aurangzeb.