Which of the following is a correctly balanced equation?
A) P4 + 6 H2 ? 4 PH3
B) 1 P4 + 6 H2 ? 4 PH3
C) 0 P4 + 6 H2 ? 4 PH3
D) 2 P4 + 12 H2 ? 8 PH3
E) P4 + 3 H2 ? PH3
Answer: A
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