Correct option is B
Given:
Cost price of each article = Rs.400
For the first article sold at 12.5% profit:
Selling Price = Cost Price×(1+10012.5)=400×1.125=Rs.450
For the second article sold at 12.5% loss:
Selling Price =Cost Price×(1−10012.5)=400×0.875=Rs.350
Now, the difference in selling prices is:
Difference = 450 - 350 = Rs.100 .
Thus, the difference between the selling prices is Rs.100.