question_answer

If m is the minimum value of \[f\,\,(x,y)={{x}^{2}}-4x+{{y}^{2}}+6y,\] when x and y are subjected to the restrictions \[0\le x\le 1\] and \[0\le y\le 1,\] then the value of |m| is________.

A)  0                                

B)  7

C)  3   

D)  1

E)  None of these