The correct answer is: b) Gulab Singh.
Gulab Singh was the founder of the Dogra dynasty in Jammu. He was a general in the army of Maharaja Ranjit Singh, the ruler of the Sikh Empire. In 1822, Ranjit Singh gave Gulab Singh the jagir (estate) of Jammu. Gulab Singh expanded his territory by conquering neighboring areas, and in 1846 he was recognized by the British as the Maharaja of Jammu and Kashmir. The Dogra dynasty ruled Jammu and Kashmir until 1947, when the state was divided between India and Pakistan.
Maharaja Ranjit Singh was the ruler of the Sikh Empire from 1799 to 1839. He was a powerful and successful ruler who expanded the Sikh Empire to include much of northern India. He was also a patron of the arts and architecture.
Zorawar Singh was a Dogra general who conquered Ladakh and Baltistan in the early 19th century. He was a skilled military commander and a devout Hindu.
Hari Singh was the last Maharaja of Jammu and Kashmir. He ruled from 1925 to 1947. In 1947, he acceded to India, which led to the partition of Jammu and Kashmir between India and Pakistan.