a.(b.c) = (a.b).c is the representation for which property

a-b-c-a-b-c-is-the-representation-for-which-property

a.(b.c) = (a.b).c is the representation for which property?
A. G-ii
B. G-iii
C. R-ii
D. R-iii

The correct option is A. G-ii