The correct answer is: D. Gulab Singh
Gulab Singh was appointed as an independent ruler of Jammu by Maharaja Ranjit Singh in 1820. He was a Dogra Rajput and the founder of the Jammu and Kashmir State. He was a successful general and administrator, and he expanded his kingdom to include Ladakh, Baltistan, and Gilgit. He was also a patron of the arts and literature.
A. Zorawar Singh Kahluria was a Dogra Rajput general who served under Maharaja Ranjit Singh. He was the commander of the Sikh army that invaded Ladakh in 1834. He was killed in battle in 1841.
B. Ranjit Dev was the Raja of Jammu from 1788 to 1803. He was a powerful ruler who expanded his kingdom to include much of the present-day state of Jammu and Kashmir. He was killed in battle in 1803.
C. Sangram Dev was the Raja of Jammu from 1803 to 1820. He was a weak ruler who was unable to control his kingdom. He was deposed in 1820 by Maharaja Ranjit Singh.