The projections of head or sill of a door or window frame are A. Transoms B. Horns C. Stops D. Chocks

Transoms
Horns
Stops
Chocks

The correct answer is B. Horns.

Horns are the projections of the head or sill of a door or window frame. They are typically used to support the weight of the door or window, and to prevent it from swinging out of the frame.

Transoms are horizontal members that are installed above a door or window. They are typically used to provide ventilation or to allow light to enter a room.

Stops are vertical members that are installed at the sides of a door or window. They are typically used to prevent the door or window from swinging too far open.

Chocks are small pieces of wood or metal that are used to prevent something from moving. They are typically used to secure a load on a truck or to prevent a door from swinging open.

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