The following operations are required for tunnelling in rocky terrain : 1. Removing the foul gases 2. Marking the tunnel profile 3. Setting up and drilling 4. Checking misfire 5. Mucking The correct sequence is :
Options
A. 1 2 3 4 5
B. 2 3 5 4 1
C. 4 2 1 3 5
D. 2 3 1 4 5
Correct Answer
2 3 1 4 5
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