Six animals - Horse, Cow, Pig, Dog, Donkey and Goat are tied to a pole each, in a circle, facing each other, in random order. Goat is to the immediate right of Pig. Cow is not tied next to either Donkey or Dog. If the animals mark the vertices of a hexagon, then the Horse is diagonally opposite to the Pig.
Which pair is tied next to each other?

Options

A. (a) Horse and Goat
B. (b) Pig and Cow
C. (c) Goat and Dog
D. (d) Donkey and Dog