Let A={1,2,3,4,5,6} and consider the partition P={{1,4},{2,5},{3,6}}. An equivalence relation R on A is defined so that two elements are related exactly when they lie in the same subset of P. Which ordered pair belongs to R?
a) (2,4)
b) (3,6)
c) (1,5)
d) (1,2)