From I, We know that in a class of 25 students, Amitha ranks 18th from the bottom and 8th from the top. Sanam is three ranks above Amitha. So, Sanam ranks 5th from the top. From II, Deepa ranks 23rd from the bottom and hence, 3rd from the top. Sanam, being 2 ranks below Deepa, is, thus, 5th from the top. Hence, data in statement I alone or data in statement II are sufficient to answer the question