The correct answer is: A. Ranjit Dev.
Guru Gobind Singh visited Jammu during the reign of Raja Ranjit Dev. He was the sixth Sikh Guru and the founder of the Khalsa Panth. He was born in Patna Sahib in 1666 and died in Nanded in 1708.
Ranjit Dev was the ruler of Jammu from 1684 to 1707. He was a great patron of the arts and sciences. He built many temples, mosques, and schools. He also built a canal that brought water to the city of Jammu.
Guru Gobind Singh visited Jammu in 1696. He stayed in the city for a few days and met with Raja Ranjit Dev. The two of them discussed religious and political matters. Guru Gobind Singh also gave a sermon to the people of Jammu.
The visit of Guru Gobind Singh to Jammu was a significant event in the history of the city. It marked the beginning of a close relationship between the Sikhs and the people of Jammu.
The other options are incorrect because:
- Gaje Singh was the ruler of Jammu from 1707 to 1725.
- Gulab Singh was the ruler of Jammu from 1822 to 1857.
- Kapur Dev was the ruler of Jammu from 1586 to 1605.