A) \[\frac{pq+r}{q}=p+r\]
B) \[\frac{p+r}{q+r}=\frac{q}{r}\]
C) \[\frac{pq+pr}{ps}=\frac{q+r}{s}\]
D) \[\frac{p(q+r)}{p+s}=\frac{q+r}{s}\]
Correct Answer: C
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