Passage

Directions : The following question is accompanied by three statements (A) or (I), (B) or (II), and (C) or (III). You have to determine which statement(s) is/are sufficient/necessary to answer the question.

What will be the difference of the ages of Kuldeep and Krishana after 15 years? A. Krishana's present age is three times of Kuldeep's present age. B. After 8 years, the ratio of Krishana's age and Kuldeep's age will become 3 : 5. C. The difference between Krishana's age and Kuldeep's age was equal to two times of Kuldeep's present age.