If \(a\) and \(b\) are positive integers, is \(\dfrac{a}{b}\) an even integer?

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If \(a\) and \(b\) are positive integers, is \(\dfrac{a}{b}\) an even integer?

1. \(ab\) is an even integer.
2. \(\dfrac{b}{a}\) is an even integer.

Answer: B

Source: GMAT Club Tests