In the given figure drill holes, heading, mucking and benching are mumbered as 1, 2, 3, 4 The correct sequence is :

1.

In the given figure drill holes, heading, mucking and benching are mumbered as 1, 2, 3, 4 The correct sequence is :

22-24-20

[A].	4 1 2 3
[B].	1 2 3 4
[C].	4 1 3 2
[D].	3 4 1 3

Answer: Option C

Explanation:

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