Which statement is correct for $B_2H_6$?

  • A
    $4$ terminal $B-H$ bonds are of equal length and $2$ bridge $B-H$ bonds are of another equal length.
  • B
    The $H-B-H$ bond angles are $120^{\circ}$ and $97^{\circ}$.
  • C
    The terminal $B-H$ bond length is $119 \text{ pm}$ and the bridge $B-H$ bond length is $134 \text{ pm}$.
  • D
    All of these

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In the following reactions:
$3B_2H_6 + 6NH_3 \text{ (excess)} \xrightarrow{\Delta} 2B_3N_3H_6 + 12H_2$
$6NaH + 2BF_3 \xrightarrow{450 \ K} B_2H_6 + 6NaF$
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