Which ATS airspace class permits IFR and VFR operations and requires separation between all flights?

• A. Class A
• B. Class B
• C. Class E
• D. Class D

Answer: (B)

ATC separation for all flights is the defining feature here. When an airspace class allows both IFR and VFR operations and ATC provides separation for every flight—IFR from IFR, IFR from VFR, and VFR from VFR—that’s typically Class B. In Class B, pilots must have ATC clearance to enter, and controllers manage traffic to keep all aircraft safely separated, regardless of their flight rules.

This contrasts with other classes where VFR may operate without guaranteed separation from other VFR traffic, or where only IFR operations are permitted. That combination—mixed IFR/VFR access with universal ATC separation—fits Class B best.