Given below are two statements:

Statement I: The cerebral hemispheres are connected by nerve tract known as corpus callosum.

Statement II: The brain stem consists of the medulla oblongata, pons and cerebrum.

In the light of the above statements, choose the most appropriate answer from the options given below:

To determine the correct option, let us analyze each statement individually based on human neuroanatomy:

Statement I: "The cerebral hemispheres are connected by nerve tract known as corpus callosum."
This statement is anatomically correct. The cerebrum is divided into two cerebral hemispheres (left and right). These hemispheres are connected to each other by a large, C-shaped bundle of myelinated nerve fibers (axons) called the corpus callosum. This tract facilitates interhemispheric communication, allowing sensory and motor information to be shared between both sides of the brain.

Statement II: "The brain stem consists of the medulla oblongata, pons and cerebrum."
This statement is anatomically incorrect. The brain stem consists of three main parts: the midbrain, the pons, and the medulla oblongata. The cerebrum is the largest part of the brain and is distinct from the brain stem, sitting superior to it. Therefore, the presence of "cerebrum" instead of "midbrain" makes this statement false.

Based on this analysis, Statement I is correct but Statement II is incorrect.