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Let A={2,3,4,5, .., 17,18} . Let ~ ' be ...

Let `A={2,3,4,5, .., 17,18} . Let `~ ' be the equivalence relation on A x A, cartesian product of A with itself defined by (a.b)~(c.d),iff ad=bc then the number of ordered pairs of the equivalence class of (3,2) is

A

a)4

B

b)5

C

c)6

D

d)7

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