In which of the following pairs of molecules/ ions, the central atoms have sp2 hybridisation ?

Question

In which of the following pairs of molecules/ ions, the central atoms have sp² hybridisation ?

NO$_2^{ - }$ and NH₃

BF₃ and NO$_2^{ - }$

NH$_2^{ - }$ and H₂O

BF₃ and NH$_2^{ - }$

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