Answer-12, 6, 6, 9, 18, ?

12times0.5 6 6 times 1 6 6 times1.5 9 9 times2 18 18 times2.5 45

Question

12, 6, 6, 9, 18,

? What should come in place of the question mark (?) in the following number series?

A 47

B 45

C 44

D 40

E None of these

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