AMC 10B 2016 Problem 2

Past Contests AMC 10 AMC 10B - 2016
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1

If n \heartsuit m=n^{3} m^{2}, what is \dfrac{2 \heartsuit 4}{4 \heartsuit 2} ?

Answer Choices
A. \dfrac{1}{4}
B. \dfrac{1}{2}
C. 1
D. 2
E. 4