Which one of the following parts of human brain is the regulating centre for swallowing and vomiting?

The correct answer is C because the medulla oblongata is the lowest part of the brainstem and acts as the primary control center for autonomic involuntary functions. It contains specific reflex centers that coordinate complex muscular actions such as swallowing, vomiting, coughing, sneezing, and hiccuping. Additionally, it regulates vital life processes like heartbeat, blood pressure, and breathing. While the cerebellum handles balance, the cerebrum manages high level functions, and the pons connects different brain parts, it is the medulla oblongata that specifically regulates the reflex arcs for swallowing and vomiting.