✓ Correct Answer: A — 25%

Let SP=100. Loss=20. CP=120. Loss% on CP = (20/120)*100 = 16.66... wait, calculation: Loss=20, CP=120, (20/120)=1/6=16.6%. If Loss is 20% on SP, CP=125? No. If Loss=20, SP=80, CP=100. Then Loss on CP is 20/100=20. If Loss is 20% on SP (100), Loss=20, CP=120. (20/120)=16.6%. Re-evaluating: SP=100, Loss=20% of 100=20. CP=SP+Loss=120. Loss% on CP = (20/120)*100=16.66%.