What is the correct sequence of the following events in rock tunnelling?_x005F_x000D_1. marking tunnel profile_x005F_x000D_2. loading explosives and blasting_x005F_x000D_3. checking misfire_x005F_x000D_4. mucking_x005F_x000D_5. removing foul gas_x005F_x000D_6. setting up and drilling_x005F_x000D_7. guniting_x005F_x000D_Select the correct answer using the codes given below Codes ?

• A. 1,6,5,3,4,2,7
• B. 1,2,6,3,5,4,7
• C. 1, 6,2, 5,4, 3, 7
• D. 1,6,2,5,3,4,7