A __________ is a course of stone which is laid at the top wall

a-is-a-course-of-stone-which-is-laid-at-the-top-wall

A __________ is a course of stone which is laid at the top wall so as to protect the wall from rain water.

A. Course

B. Cornice

C. Corbel

D. Coping

I had been asked this question during an interview.

I want to ask this question from Terms Used in Stone Masonry topic in section Stone and Brick Masonry of Construction & Building Materials

Right choice is D. Coping

To explain: The course of coping is generally provided at the top of a compound wall or a parapet wall and it is suitably weathered and throated. Sometimes the term Coping is used to refer a cutting of the stone by means of feathers, plugs and wedges.