Which of the Following Is the Correct Algebraic Expression of Modified

Which of the following is the correct algebraic expression of modified duration? (PV01 is based on interest rate(r) that are compounded m times a year instead of continuously)

A) Modified duration=[DUR/(1+ r/m) ] $\times$ 0.0001 $\times$ P
B) Modified duration=[DUR/(1- r/m) ] $\times$ 0.0001 $\times$ P
C) Modified duration= DUR/(1+ r/m)
D) Modified duration= DUR/(1- r/m)