The correct answer is option 2, Bairam Khan. In the early days of Akbar`s reign, he was only 13 years old and too young to rule independently. Therefore, a regent was appointed to govern on his behalf. Bairam Khan, a trusted advisor and military commander, was chosen as the regent. He played an essential role in stabilizing the empire during Akbar`s early years as emperor. Bairam Khan successfully led military campaigns and consolidated Akbar`s rule over various regions, including Punjab and Delhi. However, their relationship later became strained, leading to Bairam Khan`s downfall and eventual exile. It is important to note that while AbulFazl, Tansen, and Todarmal were prominent individuals during Akbar`s reign, they did not serve as his regent in his early days.