Answer:
c. 3,1,2.
Step-by-step explanation:
In the three steps given in the question, the aim is to make sure that the step-by-step process is listed according to their corresponding number. This numbering will list the correct sequence of the whole process.
So, the correct sequence is as follows-
3. Unscrew face plate and keep it in the drawer while cleaning.
1. Brush dust away then put a little amount of oil while rotating the balance wheel to inner parts can be accessed.
2. Put back the face plate in place.
Thus, the correct answer is option c.