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Two positive integers $m$ and $n$ are expressed as $m = p^5q^2$ and $n = p^3q^4$, where $p$ and $q$ are prime numbers. The LCM of $m$ and $n$ is :
- (a)$p^8q^6$
- (b)$p^3q^2$
- (c)$p^5q^4$
- (d)$p^5q^2+ p^3q^4$
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(C) $p^5q^4$