The type of pointing in which upper side of mortar joints is kept about 12 mm inside the face of the masonry and bottom is kept flushed with face of wall, is A. Truck pointing B. Recessed pointing C. Struck pointing D. Grooved pointing

The correct answer is B. Recessed pointing.

Recessed pointing is a type of pointing in which the upper side of the mortar joints is kept about 12 mm inside the face of the masonry and the bottom is kept flushed with the face of the wall. This type of pointing is used to create a decorative effect and to protect the masonry from the elements.

Truck pointing is a type of pointing in which the mortar is applied to the joints in a thick layer and then smoothed with a trowel. This type of pointing is not as durable as recessed pointing and is not often used in exterior applications.

Struck pointing is a type of pointing in which the mortar is applied to the joints in a thin layer and then struck off with a trowel to create a smooth, flat surface. This type of pointing is often used in interior applications.

Grooved pointing is a type of pointing in which the mortar is applied to the joints in a thin layer and then grooves are cut into the surface of the mortar with a trowel. This type of pointing is often used to create a decorative effect.