If \(P, Q, R,\) and \(S\) are positive integers, and \(\dfrac{P}{Q} = \dfrac{R}{S},\) is \(R\) divisible by \(5?\)

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If \(P, Q, R,\) and \(S\) are positive integers, and \(\dfrac{P}{Q} = \dfrac{R}{S},\) is \(R\) divisible by \(5?\)

(1) \(P\) is divisible by \(140.\)

(2) \(Q = 7^x,\) where \(x\) is a positive integer.

Answer: C

Source: Manhattan GMAT