A man purchases two clocks A and B at a total cost of Rs 650. He sells A with 20% profit and B at a loss of 25% and gets the same selling price for both the clocks. What are the purchasing prices of A and B respectively?

1. (a)Rs 225; Rs 425
2. (b)Rs 250; Rs 400
3. (c)Rs 275; Rs 375
4. (d)Rs 300; Rs 350