Both A and R are true and R is the correct explanation of A.

Both A and R are true but R is not the correct explanation of A.

A is true but R is false.

A is false but R is true.

English bond

double flemish bond

zigzag bond

single flemish bond

90 mm

180 mm

190 mm

280 mm

along the direction of bedding planes

at 45° to the direction of bedding planes

at 60° to the direction of bedding planes

perpendicular to the direction of bedding planes

headers

stretchers

brick bats

queen closer