The correct option is A 1846
After the First Sikh War ended, with the British emerging victorious, the Governor-General Lord Hardinge signed a treaty with the Lahore government on 9 March 1846. This was known as the First Treaty of Lahore. One of its terms mandated that Maharaja Dalip Singh and his successors had to remove their possessions from the area south of the river Satluj.