有两短周期元素X和Y，可组成化合物XY3，当Y的原子序数为m时，X的原

有两短周期元素X和Y，可组成化合物XY₃，当Y的原子序数为m时，X的原子序数为①m－4，②m＋4，③m＋8，④m－2，⑤m＋6，其正确的组合是( )

A．①②④ B．①②⑤

C．①②③⑤ D．①②③④⑤

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