Which one of the following does not have a py | vedclass

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(B) In the case of $(SiH_3)_3N$,the nitrogen atom is $sp^2$ hybridized because the lone pair of electrons on the nitrogen atom is donated into the emp

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$(SiH_3)_3N$

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(B) In the case of $(SiH_3)_3N$,the nitrogen atom is $sp^2$ hybridized because the lone pair of electrons on the nitrogen atom is donated into the empty $d$-orbital of the silicon atom,forming a $d\pi - p\pi$ back-bonding.This results in a trigonal planar geometry for $(SiH_3)_3N$.In contrast,$(CH_3)_3N$,$P(CH_3)_3$,and $P(SiH_3)_3$ all have a lone pair on the central atom and exhibit a pyramidal shape due to $sp^3$ hybridization.

Which one of the following does not have a pyramidal shape?

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