**Concept: The question tests on the basics of equations in the format of a Word Problem in DS**

**Solution:**

Let the price of each donut be a$ and that of a bagel be b$.

St (1) 10a + 6b = 12.90

- 5a + 3b = 12.90 /2

Thus **sufficient **

** **

St (2) Given a = b – 0.15

Thus 5a + 3b

= 5(b-0.15) + 3b

We do not know the value of a or b and hence **Insufficient.**

Thus **option (A)**