Studies of identical twins in which one twin has schizophrenia have revealed a relationship between schizophrenia and enlargement of the:

a. cerebral ventricles.

b. anterior cingulate.

c. cerebral arteries.

d. pineal gland.

Cerebral ventricles.

Explanation:

A cerebral ventricle is a part of the brain that is divided into 4 anatomic cavities and it is where the cerebrospinal fluid (CSF) is produced.

This ventricles are connected to the central canal of the spinal cord from the fourth ventricle, and this allows the flow of cerebrospinal fluid to circulate all over the brain.