Ibn Batuta, a Moroccan scholar and explorer, visited India during the reign of Muhammad bin Tughluq. Muhammad bin Tughluq was the Sultan of Delhi from 1325 to 1351. He was known for his ambitious and often controversial policies, which included the introduction of token currency and the shifting of his capital from Delhi to Daulatabad. Ibn Batuta`s visit to India took place during his extensive travels around the world, which lasted for nearly three decades. It is important to note that the other options, namely Iltutmish, Ala-ud-din Khalji, and Balban, were rulers of the Delhi Sultanate, but they did not overlap with the time period of Ibn Batuta`s visit. Therefore, the correct answer is option 3, Muhammad bin Tughluq.