A dealer marks his goods 20% above cost price. He then allows some discount on it and makes a profit of 12%. The rate of discount is

A

6 $$\frac{2}{3}$$ %

B

6 $$\frac{1}{4}$$ %

C

33 $$\frac{1}{3}$$ %

D

16 $$\frac{2}{3}$$ %