Consider the following statements:
1. For the application of optimality test in case, of transportation model, the number of allocations should be equal to m + n, where m is the number of rows and n is the number of columns of the matrix
2. Transportation problem is a special case of a linear programming problem
3. In case of assignment problem the first step is to make a square matrix by adding a dummy row or a dummy column
Which of the above statements is/are correct?
(a) 1, 2 and 3 (b) 1 and 2 only
(c) 2 and 3 only (d) 2 only