The correct option is (c) Rubble-backed brick masonry
For explanation I would say: Bricks and stones can be simultaneously used in three forms of composite masonry – brick-backed ashlar masonry, brick-backed stone slab facing and rubble-backed brick masonry. In brick-backed ashlar masonry, alternate courses of ashlar are present. Brick-backed stone slab facing is composed of bricks which are laid in courses with proper bonds whereas rubble-backed brick masonry is usually used at locations where rubble stone is available in huge amounts, but ashlar is not available.