The feasible region corresponding to the linear constraints of a Linear Programming Problem is given below. 
 
 
 
 Which of the following is not a constraint to the given Linear Programming Problem? 
 (a) x +y≥ 2 
 (b) x+2y≤ 10 
 (c) x-y ≥ 1 
 (d) x-y≤ 1
                    
            
            Solution