Which of the following are two groups of firearms?

The classification of firearms into two groups is typically based on their size and design attributes, which helps in understanding their intended use and operational characteristics. The distinction between long arms and handguns is a fundamental categorization in firearms terminology. Long arms, which include rifles and shotguns, are designed to be fired from the shoulder and are generally intended for hunting, sport shooting, or law enforcement applications. Handguns, which encompass revolvers and semi-automatics, are designed to be fired with one hand and are often utilized for personal defense or competitive shooting.

This classification provides a foundational understanding of firearms, aiding law enforcement, forensic experts, and analysts in fieldwork, investigations, and safety protocols. Recognizing the differences in size, firing mechanism, and purpose between long arms and handguns is important for effectively analyzing crime scenes and understanding the implications associated with each type of firearm.

The other options represent specific types of firearms or uses but do not encompass the broader categories of firearm classification as distinctly as long arms and handguns do.