A trader lists his articles 20% above C.P and allows a discount of 10% on cash payment. His gain percent is:

A. 10%
B. 8%
C. 5%
D. 6%
Explanation:
C.P = Rs. 100.
Then marked price = Rs. 120
S.P = 90% of Rs. 120 = Rs. 108
Gain = 8%