The vertical sides of a door and window openings provided in a wall, are known as A. Verticals B. Reveals C. Jambs D. None of these

Verticals
Reveals
Jambs
None of these

The correct answer is C. Jambs.

A jamb is the vertical side of a door or window opening. It is the frame that the door or window fits into. Jambs are typically made of wood, metal, or stone.

A reveal is the exposed area of a wall between the jamb and the framing. It is the space between the door or window and the wall. Reveals can be used to add decorative detail to a door or window opening.

A vertical is a line that runs up and down. It is perpendicular to a horizontal line. Verticals are often used in architecture to create a sense of order and stability.

None of these is not the correct answer.