Ravi was asked to make four groups each with three animals which are useful to humans in a similar way. But he made a mistake. Select the option with mistake.

Ravi was asked to make four groups each with three animals which are u

1.	Ravi was asked to make four groups each with three animals which are useful to humans in a similar way. But he made a mistake. Select the option with mistake.
A.	Sheep, Yak, Rabbit
B.	Cow, Goat, Buffalo
C.	Hen, Duck, Goose
D.	Elephant, Mule, Crocodile
Answer» E.