A. S + P+ → P + S +
B. Q + S+ → S + Q+
C. R + P+ → P + R+
D. S + Q+ → Q + S+
Correct Answer: Option B
B. Q + S+ → S + Q+
A. S + P+ → P + S +
B. Q + S+ → S + Q+
C. R + P+ → P + R+
D. S + Q+ → Q + S+
Correct Answer: Option B
B. Q + S+ → S + Q+
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