The Tashkent Declaration was signed between India and Pakistan on 10th January 1966 to resolve the issues stemming from the 1965 India-Pakistan war. The signatories were Prime Minister Indira Gandhi of India and President Ayub Khan of Pakistan. However, the meeting was held in Tashkent, which was part of the former Soviet Union, but it was not held under the Indo-Soviet Treaty of Peace, Friendship, and Cooperation. Hence, option (4) is incorrect.