What is the formula for calculating the drill size for reaming?

A. Drill size=Reamed size-(Under size-over size)

B. Drill size=Reamed size+ (Under size + over size)

C. Drill size=Reamed size-(Under size +over size)

D. Drill size=Reamed size-(Under size x over size)

Correct Answer: Drill size=Reamed size-(Under size +over size)