Exposed portions of vertical surface at right angles to the door or window frame, are known as A. Jambs B. Lintels C. Reveals D. Soffits

Jambs
Lintels
Reveals
Soffits

The correct answer is: C. Reveals

A reveal is the exposed portion of a vertical surface at right angles to the door or window frame. It is the space between the frame and the wall. Reveals can be used to add visual interest to a room, and they can also be used to hide imperfections in the wall.

A jamb is the vertical side of a door or window frame. It is the part of the frame that the door or window swings on.

A lintel is a horizontal beam that supports the weight of the wall above a door or window opening.

A soffit is the underside of an architectural element, such as an eave or a cornice.