Correct Answer: Option A

Explanation

5x + 7 \(\equiv\) P(x + 3) + Q(x - 1),

Put x = 1 

5(1) + 7 \(\equiv\)  P(1 + 4) + Q(1 - 1)

12 \(\equiv\) 4p + 0

P = \(\frac{12}{4}\) = 3

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