This door is constructed of multiple winged sections that rotate in a circular frame.

• A. Swinging
• B. Sliding
• C. Folding
• D. Revolving

Answer: (D)

A revolving door is defined by multiple winged sections that rotate around a central axis inside a circular frame. The key idea is rotational movement within a circular boundary, with several panels turning together rather than sliding or swinging on hinges. This matches the description because you have several leaves arranged around a circle that spin to admit passage.

Swinging doors hinge on one side and swing open, usually as a single or double leaf; sliding doors move along a straight track; folding doors have panels that hinge and fold along a track. None of those configurations create a circular frame with rotating wings like a revolving door.