Which for loop has range of similar indexes of ‘k’ used

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Which for loop has range of similar indexes of ‘k’ used in for (k = 0;k < num; k++)?

1. for (k = num; k >= 0; k–)
2. for (k = num-1; k>-1; k–)
3. for (k = num; k>0; k–)
4. for (k = num-1; k>0; k–)
5. None of these

Correct Option: B

for (k = num-1; k>-1; k–)