Step 1:
Initial feasible solution methods are used to obtain the first basic feasible solution of a transportation problem.
Step 2:
The commonly used methods are:
• North West Corner Rule
• Lowest Cost Entry Method
• Vogel's Approximation Method (VAM)
Step 3:
• Stepping Stone Method
• MODI Method
These are used for testing optimality, not for obtaining initial feasible solution.
Step 4:
Therefore, correct methods are:
\[
B,\; C,\; D
\]
Hence, the correct answer is:
\[
\boxed{\text{(4) B, C and D only}}
\]