The correct option is
A Cerebrum
a) Cerebellum serves to coordinate the voluntary movements of skeletal muscles as well as posture, balance and equilibrium.
b) Cerebrum serves to receive sensory inputs, to bring about integration before commanding voluntary motor responses, to coordinate the activities of another part of the brain, and to carry out higher thought processes for learning, memory, language and speech.
c) Midbrain is the small middle part of brain stem which is associated with vision, hearing, motor actions, arousal and temperature sensation.
d) Medulla oblongata consists of reflex centres that control heartbeat, blood vessel diameter and rhythm of breathing as well as other vital functions.
So, the correct answer is option B.