The three major parts of the brain are the:

• A. Cerebrum, cerebellum, and brain stem
• B. Cerebrum, thalamus, and hypothalamus
• C. Cerebellum, medulla, and spinal cord
• D. Cerebrum, brainstem, and spinal cord

Answer: (A)

The three major parts of the brain are the cerebrum, cerebellum, and brainstem. The cerebrum handles higher functions like thinking, memory, and voluntary movement. The cerebellum coordinates movement and balance. The brainstem controls essential life-sustaining functions and acts as the main conduit between the brain and spinal cord, consisting of the midbrain, pons, and medulla. The thalamus and hypothalamus are deeper structures within the cerebrum's region (the diencephalon), not counted as separate major parts. The spinal cord is a separate structure that carries signals between the brain and the body, not a brain part. The medulla is part of the brainstem, not a distinct major part. So the combination cerebrum, cerebellum, and brainstem matches the standard three-part organization.