Arbor vitae is part of
a)	Cerebrum	b)	Cerebellum	c)	Midbrain	d)	Forebrain

(b)

Cerebellum is an ovoid part of the brain and is located below the occipital lobes of the cerebrum.

Its surface is formed by numerous patches of grey matter, which deep down into white matter. Intermixing of white and grey matter provides the appearance of tree-like structure, which is known as arbor vitae.