This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Miscellaneous, Subject name: Psychiatry
A 48 year old male incurred road traffic accident leading to a brain lesion. Now the patient feels euphoric, laugh uncontrollably, joke & make puns. Which of the following brain part may be involved? 
Select and explain. 
A. Parietal lobe, B. Prefrontal cortex, C. Occipital lobe, D. Cerebellum
B: Prefrontal cortex
Answer: B: Prefrontal cortex 
Explanation: Ans. B. Prefrontal cortexA lesion to the left prefrontal area abolishes the normal mood-elevating influences of this area and produces depression and uncontrollable crying. In contrast, a comparable lesion to the right prefrontal area may produce laughter, euphoria, and a tendency to joke and make puns.