In which of the following pairs bond angle is\[109{}^\circ 28'\]?

1.	In which of the following pairs bond angle is\[109{}^\circ 28'\]?
A.	\[[N{{H}^{+}}_{4}],[B{{F}^{-}}_{4}]\]
B.	\[N{{H}^{+}}_{4}\],\[[B{{F}_{3}}]\]
C.	\[B{{H}_{2}}^{-}\][\[B{{F}^{-}}_{4}\]]
D.	\[[N{{H}^{{}}}_{3}]\],\[B{{F}^{{}}}_{3}\]
Answer» B. \[N{{H}^{+}}_{4}\],\[[B{{F}_{3}}]\]

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In which of the following pairs bond angle is\[109{}^\circ 28'\]?

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