Two points A and B in a plane are related if OA =OB, Where O is a fixed point. This relation is
A partial order relation
Equivalence relation
Reflexive but not symmetric
Reflexive but not transitive
OA = OA ; OA = OB ⇒OB=OA
OA = OB ; OB = OC ⇒OA=OC
Hence it is equivalence relation