Understanding syntax for defining a relation.

Question

Let T = {1, 2, 3, 4} and A = T * T. We can define a relation R on A;

(a,b)R(c,d) <=> (a/b)=(c/d)

For example:

(1,2)R(2,4) since (1/2)=(2/4)

Does this mean that ((1,2),(2,4)) ∈ R

or

(1,2) ∈ R and (2,4) ∈ R

Answer 1

It means that ((1,2),(2,4)) ∈ R