What is the standard shape and extent of a Flight Restriction Zone (FRZ) around a UK aerodrome with a single runway?
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A
A circle with a 2 km radius centred on the runway
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B
A cylinder extending 1 km from the aerodrome boundary up to 2,000 feet
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C
A shape resembling a keyhole or lozenge extending along the runway centreline
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D
A square zone of 5 km × 5 km centred on the control tower