Tashkent Agreement was signed between:

India and Pakistan

The correct answer is option (1) - India and Pakistan

In January 1966, Indian Prime Minister Lal Bahadur Shastri and Pakistan’s General Ayub Khan formalized an agreement known as the Tashkent Agreement, following the Indo-Pakistani War of 1965, which had been facilitated by the Soviet Union. The agreement aimed to restore peace and normalize relations between the two countries after the conflict.