Discussion
By factorizing algebraic expression mp - np + mq - nq, answer will be
Answer: B
Group the terms in pairs and factor each.
\[ mp - np + mq - nq = p(m - n) + q(m - n) \]
\[ = (p + q)(m - n) \]
The bracket \( (m-n) \) appears in both parts, so it comes out as the common factor.
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