The correct option is B Medulla oblongata
The medulla oblongata is a major structure located in the lower half of the brainstem. It is responsible for the regulation of your heart rate, breathing and blood pressure, as well as reflexes, such as vomiting, sneezing and coughing.
This section of the brain helps transfer messages to the spinal cord and the thalamus, which is in the brain, from the body. The main function of the thalamus is to process information to and from the spinal cord and the cerebellum.
The medulla oblongata helps regulate breathing, heart and blood vessel function, digestion, sneezing and swallowing. This part of the brain is a center for respiration and circulation. Sensory and motor neurons (nerve cells) from the forebrain and midbrain travel through the medulla.