If A:B = 2:3, B:C = 4:5 and C:D = 5:9 then A:D is equal to: Choose the correct choice from the following options
A) 11 : 17 B) 8 : 27 C) 5 : 9 D) 2 : 9 E) none

Rationale: "solution : a / d = ( a / b ) * ( b * c ) * ( c / d ) = ( 2 / 3 ) * ( 4 / 5 ) * ( 5 / 9 ) = ( 2 * 4 * 5 ) / ( 3 * 5 * 9 ) = 8 / 27 . answer : option b"
Answer: B