If the binary operation * is deined on a set of ordered pairs of real numbers as (a,b)*(c,d)=(ad+bc,bd) and is associative, then (1, 2)*(3, 5)*(3, 4) equals

If the binary operation * is deined on a set of ordered pairs of re

1.	If the binary operation * is deined on a set of ordered pairs of real numbers as (a,b)(c,d)=(ad+bc,bd) and is associative, then (1, 2)(3, 5)*(3, 4) equals
A.	(7,11)
B.	(23,11)
C.	(32,40)
D.	(74,40)
Answer» E.