The two cerebral hemispheres are separated by the

a. longitudinal fissure

b. central sulcus

c. lateral sulcus

d. parieto-occipital sulcus

e. postcentral sulcus

The correct answer is A. The two cerebral hemispheres are separated by the longitudinal fissure.

Explanation:

The longitudinal or intercerebral fissure is a deep cleft that divides the brain longitudinally into two hemispheres (the right and the left) joined together by the corpus callosum. Other fissures, such as the central sulcus, the lateral sulcus and the internal perpendicular fissure, divide each hemisphere into large cerebral lobes, which in turn have cerebral convolutions.