The compound ratio of 1:2, 3:2 and 4:5?  Choose the correct choice from the following answers:
A) 1 : 9 B) 1 : 7 C) 1 : 2 D) 3 : 5 E) 1 : 4

Rationale: "1 / 2 * 3 / 2 * 4 / 5 = 3 / 5 = 3 : 5 answer : d"
Answer: D