A. X(g) + Y(g) ⇌ W(g)+ Z(g)
B. X(g) + 2Y(g) ⇌W(g) + Z(g)
C. 2X(g) ⇌ W(g) + Z(g)
D. 2Y(g) ⇌ W(g) + Z(g)

Correct Answer: Option B

B. X(g) + 2Y(g) ⇌W(g) + Z(g)

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