A deep cleft divides the cerebrum longitudinally into two halves, which are termed as the left and right cerebral hemispheres. The hemispheres are connected by a tract of nerve fibres called ___________.

Corpus callosum.

The correct answer is Option (2) - Corpus callosum.

The tract of nerve fibers that connects the two cerebral hemispheres, allowing communication between them, is called the Corpus Callosum.

The forebrain consists of cerebrum, thalamus and hypothalamus.

Cerebrum forms the major part of the human brain. A deep cleft divides the cerebrum longitudinally into two halves, which are termed as the left and right cerebral hemispheres. The hemispheres are connected by a tract of nerve fibres called corpus callosum. The layer of cells which covers the cerebral hemisphere is called cerebral cortex and is thrown into prominent folds.

The cerebrum wraps around a structure called thalamus, which is a major coordinating centre for sensory and motor signaling.

The midbrain is located between the thalamus/hypothalamus of the forebrain and pons of the hindbrain. A canal called the cerebral aqueduct passess through the midbrain.