​The Congress and the Muslim League signed the historic ________ in 1916.​

Correct option is D

• ​Lucknow Pact is considered as an important Pact for Hindu Muslim unity during the Indian freedom struggle.
• The Lucknow Pact was an agreement between the Indian National Congress and the Muslim League. It was held in Lucknow in December 1916.
• It was for the first time that the Hindus and the Muslims came together on common ground.
• It sowed the seed of belief among the British that India could get a government of Self.
• Lucknow session of Indian National Congress was presided by Ambika Charan Mazumdar, and it is also famous as Lucknow pact of 1916 because in this session liberals and hardline cultist got united.
• In the Lucknow session of 1916, All India Muslim League was also merged with Indian National Congress.
  
• The Lahore Declaration was a bilateral agreement and governance treaty between India and Pakistan. The treaty was signed on 21 February 1999, at the conclusion of a historic summit in Lahore, and ratified by the parliaments of both countries the same year. Official flags of India and Pakistan at the Wagha border.
• The Treaty of Surat was signed on March 6, 1775 between Raghunathrao and the British East India Company.
• The treaty was a result of internal conflicts among Maratha leaders and the British East India Company's desire to expand its influence in the Maratha territory. 
• The Delhi Pact, also known as the Nehru-Liaquat Pact, was a bilateral agreement between India and Pakistan signed on April 8, 1950.