In which of the following species the inter atomic bond angle is 109^(

1.	In which of the following species the inter atomic bond angle is 109^(@).28?
Answer» `NH_(3)(BF_(3))` `(NH_(4))^(+)(BF_(3))` `NH_(3)(BF_(4))^(-)` `(NH_(2))^(-)(BF_(3))` Answer :A

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