The correct answer is: a) Babur
Babur was the first Mughal emperor, who ruled from 1526 to 1530. He was a Muslim, but he was tolerant of other religions, including Sikhism. He even granted land to the Sikh Guru Nanak Dev Ji.
Akbar was the third Mughal emperor, who ruled from 1556 to 1605. He was also a Muslim, but he was even more tolerant of other religions than Babur. He invited Sikh Guru Amar Das Ji to his court and gave him a robe of honor.
Aurangzeb was the sixth Mughal emperor, who ruled from 1658 to 1707. He was a devout Muslim and he persecuted other religions, including Sikhism. He ordered the execution of the ninth Sikh Guru Tegh Bahadur Ji.
Shah Jahan was the fifth Mughal emperor, who ruled from 1628 to 1658. He was a Muslim, but he was not as intolerant as Aurangzeb. He allowed the Sikh Guru Har Rai Ji to build a new Gurdwara in Amritsar.
In conclusion, Babur was the Mughal emperor who was particularly devoted to Sikhism. He was tolerant of other religions and he even granted land to the Sikh Guru Nanak Dev Ji.