The correct answer is option 3, Akbar. Akbar was a Mughal Emperor who introduced the policy of Sulh-ikul, also known as "universal peace". This policy aimed to create harmony and promote tolerance among people of different religions and backgrounds within the Mughal Empire. Akbar wanted to create a unified empire, so he adopted a policy of religious tolerance and equality. This was in stark contrast to the previous rulers who mainly followed an intolerant approach towards non-Muslims. Under the policy of Sulh-ikul, Akbar abolished the discriminatory jizya tax on non-Muslims and ended the practice of forced conversions. He also encouraged interfaith dialogues and discussions, creating an environment of religious coexistence and understanding. The policy of Sulh-ikul played a significant role in promoting social harmony and promoting the growth of different religions and cultures in the Mughal Empire.