Consider the following compounds:
$I. H_3X-NCS$
$II. H_3Y-NCS$
$III. (H_3X)_2O$
$IV. (H_3Y)_2O$
The incorrect statement regarding the given compounds is:

• A
  If $Y$ is carbon in compounds $II$ and $IV$,then both are bent.
• B
  If $X$ is silicon in compounds $I$ and $III$,then both are linear.
• C
  If $X$ is carbon and $Y$ is silicon,then compound $I$ is more basic than compound $II$.
• D
  If $X$ is silicon and $Y$ is carbon,then $X-O-X$ bond angle in compound $III$ is greater than $Y-O-Y$ bond angle in compound $IV$.