Consider the following statements with respect to duality in LPP : 

(a)    The final simplex table giving optimal solution of the primal also contains optimal solution of its dual in itself. 
(b)    If either the primal or the dual problem has a finite optimal solution, then the other problem also has a finite optimal solution. 
(c)    If either problem has an unbounded optimum solution, then the other problem has no feasible solution at all. 
Which of the statements is (are) correct?