Explanation:

Second option is correct.

INF treaty was signed between the USSR and USA in 1987. It was recenlty in news as USA has declared to withdraw from the treaty because of violation of Russia of the treaty.

The Intermediate-Range Nuclear Forces Treaty was an arms control treaty between the United States and the Soviet Union. U.S. President Ronald Reagan and Soviet General Secretary Mikhail Gorbachev signed the treaty on 8 December 1987.