Which compound has incomplete octet?

1.	Which compound has incomplete octet?
Answer» `H_(2) O, SP^(2)`, linear `NH_(4)^(+)DSP^(2)` square planar `H_(2) O, sp^(3)` , angular `CH_(4) , dsp^(3)` tetrahedral Solution :`H_(2) O, sp^(3)` , angular

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