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Which of the following is a valid reason for causing degeneracy in a transportation problem? Here $m$ is number of rows and $n$ is number of columns in transportation table.

  1. When the number of allocations is $m+n-1$
  2. When two or more occupied cells become unoccupied simultaneously
  3. When the number of allocations is less than $m+n-1$
  4. When a loop cannot be drawn without using unoccupied cells, except the starting cell of the loop
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When the number of allocations is less than m+n−1, it causes degeneracy in transportation problem.
option (C) is correct.
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