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【单选题】
有Fe 3+ 、Fe 2+ 、NO 3 － 、NH 4 + 、H + 和H 2 O六种微粒，分别属于一个氧化还原反应中的反应物和生成物，下列叙述中，不正确的是
A.
还原产物为NH 4 +
B.
氧化剂与还原剂的物质的量之比为1∶8
C.
若有0.5mol NO 3 － 参加还原反应，则转移电子8mol
D.
若把该反应设计为电解池，则阳极反应为Fe 2+ －e→Fe 3+
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