The correct option is A Rs. 150
Suppose the CP of the article = Rs. 100
I case :
Profit =5%
SP = 100+5 = Rs. 105
II case :
Loss =5%
SP = CP − loss = 100−5 = Rs. 95
Difference between two SP's
= 105−95 = Rs. 10
If the difference = Rs. 10, then CP = Rs. 100
If the difference = Rs. 15, then CP =10010×15= Rs. 150