Consider the following operations:1. Drilling2. Blasting3. Mucking4. Placing steel5. Placing concreteThe correct sequence of these operations in tunnel construction is

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