The Treaty of Peace and Friendship was signed in August 1971 between:

India - Soviet Union

The correct answer is option (3) - India - Soviet Union

In an effort to counterbalance the alliance between the US, Pakistan, and China during the Indo-Pak War of 1971, India established a 20-year Treaty of Peace and Friendship with the Soviet Union in August 1971. This pact assured India of Soviet backing in case of any hostile threats.