Answer: Option B
$$\eqalign{
& \,\,\,\,\,\,1|\overline 1 .\overline {56} \overline {25} \,(\,1.25 \cr
& \,\,\,\,\,\,\,\,\,|1 \cr
& \,\,\,\,\,\,\,\,\,| - - - - - \cr
& \,\,\,22|\,\,\,\,56 \cr
& \,\,\,\,\,\,\,\,\,|\,\,\,\,44 \cr
& \,\,\,\,\,\,\,\,\,| - - - - - \cr
& 245|\,\,\,1225 \cr
& \,\,\,\,\,\,\,\,\,|\,\,\,1225 \cr
& \,\,\,\,\,\,\,\,\,| - - - - - \cr
& \,\,\,\,\,\,\,\,\,|\,\,\,\,\,\,\,\,\,\,\,x \cr
& \,\,\,\,\,\,\,\,\,| - - - - - \cr
& \therefore \sqrt {1.5625} = 1.25 \cr} $$