Let G be a connected graph with vertex set V(G) and d(u,v) the distance between vertices u v. A of S={s1,s2,…,sk}?V(G) is called resolving for if, any two distinct u,v?V(G), there si?S such that d(u,si)?d(v,si). S fault-tolerant if S\{x} also set, each x in S, metric dimension G, denoted by ??(G), minimum cardinality set. The paper Basak et al. on circulant graphs Cn(1,2,3) has determined exact...