Explanation:

- Option 4: Shah Jahan - Shah Jahan, the Mughal Emperor, built the Taj Mahal in memory of his wife Mumtaz Mahal. This majestic mausoleum stands along the banks of the Yamuna River in Agra. It is celebrated as a UNESCO World Heritage Site and an exemplary piece of Mughal architecture.

- Option 1: Aurangzeb - He was the son of Shah Jahan but did not build the Taj Mahal. Aurangzeb ruled after Shah Jahan and is known for his expansion of the Mughal Empire.

- Option 2: Akbar - Akbar was Shah Jahan’s grandfather. Known for his architectural innovations, he did not build the Taj Mahal.

- Option 3: Jahangir - Jahangir was Shah Jahan's father. His reign was marked by artistic achievements, but the Taj Mahal was not built during his period.