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The decreasing values of bond angles fro...

The decreasing values of bond angles from `NH_3 (106^@)` to ` SbH_3 ( 101^@)` down the group `15` of the periodic table is due to :

A

Decreasing electrongativity

B

Increasing hp-hp repulsion

C

Increasing p-orbital churacter in sp^(3)

D

Decreasing `lp-bp` repulsion

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A
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