Which statement about Class B airspace is accurate?

• A. It extends from surface to 60,000 ft MSL and requires no special clearance.
• B. It is used for general aviation without any speed or equipment requirements.
• C. It generally surrounds the nation's busiest airports up to 10,000 feet MSL and requires a clearance to enter if VFR.
• D. It does not require a transponder.

Answer: (C)

Class B airspace surrounds the nation's busiest airports and is designed to manage high traffic. It generally extends from the surface up to 10,000 feet MSL, with several nested shelves sometimes having different lower boundaries. To operate in Class B, you must have two-way radio communication with ATC and you must receive explicit ATC clearance to enter, whether you’re flying VFR or IFR. You’ll also be assigned a discrete transponder code and must use a Mode C altitude-reporting transponder.

That makes the statement describing Class B as surrounding the busiest airports up to 10,000 feet MSL and requiring a clearance to enter if VFR the best fit. The other descriptions are not accurate because Class B does not reach 60,000 ft (that’s Class A), it does involve speed and equipment requirements beyond just entry rules, and a transponder is indeed required.