If A:B is 2:3 and B:C is 3:4 then A:C is equal to Options
A) 2 : 3 B) 6 : 7 C) 5 : 6 D) 1 : 2 E) 3 : 4

Rationale: "since a : b = 2 : 3 and b : c = 3 : 4 , we can deduce that a : b : c = 2 : 3 : 4 so , a : c = 2 : 4 = 1 : 2 . d is the correct answer ."
Answer: D