In the given reaction: $CH_3-CH(OH)-C(OH)(CH_3)_2 \xrightarrow{HIO_4} (a) + (b)$. $(a)$ and $(b)$ respectively are:

• A
  $CH_3CHO$ and $CH_3CHO$
• B
  $CH_3CHO$ and $CH_3COCH_3$
• C
  $CH_3COCH_3$ and $CH_3COCH_3$
• D
  $CH_3COOH$ and $CH_3COCH_3$