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If two positive integers `m` and `n` are expressible in the form `m=p q^3` and `n=p^3q^2` , where `p ,\ q` are prime numbers, then HCF `(m ,\ n)=` `p q` (b) `p q^2` (c) `p^3q^3` (d) `p^2q^3`

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