The following operations are required for tunnelling in rocky terrain : 1. Remo

Question

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

Answer: Option D
Answer: (d).2 3 1 4 5

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