This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Mood Disorders, Subject name: Psychiatry
Which of the following areas is less likely to play a role in depressive disorder? 
Select and explain. 
A. Amygdala, B. Hippocampus, C. Anterior cingulate coex, D. Corpus callosum
D: Corpus callosum
Answer: D: Corpus callosum 
Explanation: The impoant structures playing a role in depressive disorder are: * Amygdala Hippocampus Anterior cingulate coex Dorsomedial prefrontal coex Ventromedial prefrontal coex Orbital prefrontal coex