Which of the following statement$/$s is$/$are True?

i$.$ A linear programming problem with $4$ decision variables can always be solved by graphing.

ii$.$ The optimal values of the decision variables in a linear programming problem always take finite values even if the feasible region is infinite.

iii. An interior point solution can be an optimal solution of a linear programming problem.

ii and $i$

only ii

None of the statements are true

only iii

iii and $i$