Krishna Deva Raya, the 16th-century ruler of the Vijayanagara Empire, was a contemporary of Babur, the founder of the Mughal Empire. This means that both Krishna Deva Raya and Babur were ruling during the same time period.
Option 1, Shershah, is incorrect as he was a ruler during the 16th century but after the reign of Krishna Deva Raya.
Option 2, Humayun, is incorrect as he was the son of Babur and ruled after his father`s death.
Option 4, Akbar, is incorrect as he was the grandson of Babur and ruled after both his father, Humayun, and his grandfather.
Therefore, the correct answer is option 3, Babur.