Oerlikon 20 mm anti-aircraft cannons

Target entity: Oerlikon 20 mm anti-aircraft cannons
Context triple: [USS Juneau (CL-52), armament, Oerlikon 20 mm anti-aircraft cannons]

• A. Mauser BK-27 27 mm cannon
  The Mauser BK-27 is a German-designed 27 mm revolver cannon widely used in modern fighter aircraft for high-rate, accurate air-to-air and air-to-ground fire.
• B. 40 mm Bofors autocannon
  The 40 mm Bofors autocannon is a widely used, rapid-firing anti-aircraft and multi-purpose gun system renowned for its reliability and effectiveness since World War II.
• C. 37 mm Nudelman N-37 cannon
  The 37 mm Nudelman N-37 cannon is a powerful Soviet aircraft autocannon developed in the late 1940s, widely used as a primary heavy armament on early jet fighters and other combat aircraft.
• D. MG 213 cannon
  The MG 213 cannon was an experimental German 20/30 mm revolver aircraft cannon developed by Mauser during World War II that pioneered the revolver cannon design used in many postwar aircraft guns.
• E. Breda-SAFAT machine gun
  The Breda-SAFAT machine gun was a standard Italian aircraft-mounted automatic weapon used extensively by the Regia Aeronautica during the interwar period and World War II.
• F. None of above. chosen
• G. Unsure - the case is ambiguous/there is not enough information to decide.

Target entity: Oerlikon 20 mm anti-aircraft cannons
Target entity description: The Oerlikon 20 mm anti-aircraft cannon is a widely used World War II-era automatic gun renowned for its rapid-fire capability against aircraft and light surface targets on naval vessels and ground installations.

• A. Mauser BK-27 27 mm cannon
  The Mauser BK-27 is a German-designed 27 mm revolver cannon widely used in modern fighter aircraft for high-rate, accurate air-to-air and air-to-ground fire.
• B. 40 mm Bofors autocannon
  The 40 mm Bofors autocannon is a widely used, rapid-firing anti-aircraft and multi-purpose gun system renowned for its reliability and effectiveness since World War II.
• C. 37 mm Nudelman N-37 cannon
  The 37 mm Nudelman N-37 cannon is a powerful Soviet aircraft autocannon developed in the late 1940s, widely used as a primary heavy armament on early jet fighters and other combat aircraft.
• D. MG 213 cannon
  The MG 213 cannon was an experimental German 20/30 mm revolver aircraft cannon developed by Mauser during World War II that pioneered the revolver cannon design used in many postwar aircraft guns.
• E. Breda-SAFAT machine gun
  The Breda-SAFAT machine gun was a standard Italian aircraft-mounted automatic weapon used extensively by the Regia Aeronautica during the interwar period and World War II.
• F. None of above. chosen