Identify the parts labelled as P, Q, R and S in the figure and select the correct option.

• A. P Q R S Cerebrum Medulla Skull Cerebellum                
• B. P Q R S Skull Cerebrum Cerebellum Medulla
• C. P Q R S Medulla Cerebellum Cerebrum Skull                
• D. P Q R S Cerebellum Skull Medulla Cerebrum