The correct answer is number 1) Moctezuma II.
The leader that was imprisoned by Cortés was Moctezuma II.
Moctezuma II was the Aztec Emperor when the Spanish conquerors, ked by Hernando Cortes, capture the great city of Tenochtitlan, the capital city of the Aztec Empire. Moctezuma II was the 9th Emperor of the Aztecs. After Moctezuma's death, the Empire was ruled by his brother Cuitlkáhuac, and then by Cuauhtémoc, his nephew, who was the last Aztec Emperor.