Answer: Option A
$$\eqalign{
& {\text{Largest}}\,{\text{4 - digit}}\,{\text{number}} = 9999 \cr
& 88)\,\,\,\,9999\,\,\,\,(113 \cr
& \,\,\,\,\,\,\,\,\,\,\,\,\,88 \cr
& \,\,\,\,\,\,\,\,\,\,\, - - - - \cr
& \,\,\,\,\,\,\,\,\,\,\,\,\,119 \cr
& \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,88 \cr
& \,\,\,\,\,\,\,\,\,\,\, - - - - \cr
& \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,319 \cr
& \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,264 \cr
& \,\,\,\,\,\,\,\,\,\,\,\,\,\,\, - - - \cr
& \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,55 \cr
& \,\,\,\,\,\,\,\,\,\,\,\,\,\,\, - - - \cr
& \text{Required number} \cr
& = \left( {9999 - 55} \right) \cr
& = 9944 \cr} $$