British Indian Empire under the Treaty of Amritsar sold Kashmir to

Explanation: The British sold Kashmir to Gulab Singh, the Raja of Jammu, for 7.5 million rupees (75 lakhs) under the Treaty of Amritsar on March 16, 1846. The treaty was signed in Amritsar to settle a territorial dispute following the First Sikh War between the United Kingdom and the Sikhs. The treaty was signed by Gulab Singh, Hardinge, Currie, and Lawrence.
As a result of the treaty, Gulab Singh became the first Maharaja of the princely state of Kashmir and Jammu