The right answer is A. cerebrum
The human brain has the same general structure as the brain of other mammals, but it is the one whose relative size relative to the rest of the body has become the largest in evolution.
The brain, constituting the largest part of the brain and grouping together;
* The telencephalon, namely the two cerebral hemispheres, particularly voluminous and attached on both sides to the diencephalon;
* The diencephalon, surmounting the brainstem and consisting of thalamus, hypothalamus and epithalamus;