Final answer:
The subject of this question is Ballistic Missile Systems, specifically the OTR-21 Tochka (SS-21 Scarab).
Step-by-step explanation:
The subject of this question is Ballistic Missile Systems. The OTR-21 Tochka, also known as SS-21 Scarab, is a ballistic missile system developed and used by the Soviet Union during the Cold War. It was designed to deliver nuclear warheads to targets up to 185 miles away.