This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Neurotic, Stress Related and Somatoform Disorders, Subject name: Psychiatry
[{'content': 'Brain areas involved with obsessive compulsive disorder include all except: \nSelect and explain. \nA. corpus callosum, B. Orbitofrontal coex, C. Basal ganglia, D. Head of caudate nucleus', 'role': 'user'}, {'content': "Answer: A \nExplanation: Neuroanatomical Structures Involved in OCD Orbitofrontal Coex Caudate (which is a pa of Basal Ganglia) Thalamus Extra edge: Other impoant Brain areas and associated psychiatric disorders : Psychiatric Disorders Brain Areas involved 1. Anxiety disorders Locus ceruleus Raphe nucleus Caudate nucleus Temporal coex Frontal coex 2. Depression Damage to the left frontal lobe 3. Alzheimer's disease Hippocampus", 'role': 'assistant'}]