The sub-duplicate ratio of 25:49 is	Choose the correct choice from the following answers:  A) 4 : 3  B) 5 : 7  C) 6 : 4  D) 1 : 4  E) 2 : 3

Rationale: "root ( 25 ) : root ( 49 ) = 5 : 7 answer : b"
Answer: B