What method is used to sterilize an inoculating loop used in lab for culturing bacteria?

Name the steps of loop sterilization in their correct order.

1. Attach burner to gas source. Adjust air intake. 
2. Turn on gas. 
3. Light burner with striker. 
4. Adjust air supply. 
5. Heat loop until entire wire glows red. 
6. Cool loop.

hope this helps.

The correct answer is a. we know this because n (hap) + n (hap) = 2n (dip).