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下列关于有机物的说法中，正确的是 [ ] ①用尿素和甲醛制脲醛树脂包括加成反应和缩聚反应 ②标准状况下，22.4 L甲醛所含电子数约为16N A ③甲醇通常是一种有毒气体，分子中只含极性键 ④苯酚与碳酸钠溶液的反应： ⑤ 的名称为：2，2，4-三甲基-4-戊烯 ⑥3-甲基-1-丁烯中的所有碳原子不可能处于同一平面A.
①②④⑥
B.
②③④⑥
C.
②⑤
D.
①③⑤⑥
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