Subject: mathqa
Question: a hen leaps 3 leaps for every 2 leaps of a duck , but 4 leaps of the duck are equal to 3 leaps of the hen . what is the ratio of the speed of the hen to that of the duck ?
Option: 
A: 2 : 1
B: 1 : 4
C: 5 : 6
D: 4 : 3
Answer: A