Correct option is C
Facing is the process of making flat surfaces on a lathe. It involves cutting a flat surface perpendicular to the axis of rotation of the workpiece. This is typically the first operation performed on a lathe to create a smooth, flat surface at the end of the workpiece.
Boring is the process of enlarging a hole that has already been drilled or cast.
Reaming is used to finish holes to a precise diameter.
Drilling is the process of creating a hole by removing material using a drill bit.
Thus, the correct process for making flat surfaces on a lathe is Facing.
