The correct answer is a - cerebrum
The cerebrum, also called cortex is the largest part of the brain. It is divided into four sections, called lobes and these are the frontal lobe, the parietal lobe, occipital lobe and temporal lobe.
Front lobe helps in speech, reasoning, planning, movement , emotions and problem solving.
parietal lobe helps in orientation, and perception of stimuli and movement.
Occipital lobe helps in visual processing.
Temporal lobe helps in memory, speech as well as perception and recognition of auditory stimuli.