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If the binary operation ** is defined on...

If the binary operation `**` is defined 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)` =

A

(74 , 40)

B

(32 , 40)

C

(23 , 11)

D

(7 , 11)

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The correct Answer is:
A
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