What is the correct sequence of the following events in rock tunnelling?
1.Marking tunnel profile
2.Loading explosives and blasting
3.Checking misfire
4.Mucking
5.Removing foul gas
6.Setting up and drilling
7.Guniting
Select the correct answer using the codes given below.

Answer: Option D.

Explanation:

IS 14665 gives details about elevators. It specifies the number, capacityof elevator and number of floors to be served.