Human brain along with spinal cord makes up the central nervous system of the body. The brain consists of the cerebrum, brain stem, and cerebellum. The brain stem consists of midbrain, pons, and medulla. On the dorsal aspect of the midbrain, corpora quadrigemina: four colliculi, two inferior and two superior are found, which are reflex center involving vision and hearing. Whereas cerebrum is the part of the forebrain.Hence, the correct answer is option A.