If 56 75 60 84 210 = 2p 3q 5r 7s...

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If 56 × 75 × 60 × 84 × 210 = 2^p × 3^q × 5^r × 7^s, then what is the value of $$\left[ {\frac{{\left( {{\text{p}} + {\text{q}}} \right)}}{{\text{s}}}} \right] + {\text{r}}?$$

A. 6

B. 8

C. 12

D. 10

Answer: Option B

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