The correct option is A Pakistan
Tashkent Agreement was signed between India and Pakistan. President Ayub Khan signed the agreement on January 10, 1966, ending the 17-day war between Pakistan and India in 1965. The agreement was mediated by Soviet premier Aleksey Kosygin, who had invited the parties to Tashkent. The parties agreed to withdraw all armed forces to positions held before Aug. 5, 1965; to restore diplomatic relations; and to discuss economic, refugee, and other questions.