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
[{'content': 'A lady used to repeatedly wash her hands due to the fear of acquiring AIDS is due to \nSelect and explain. \nA. OCD, B. Mania, C. Depression, D. Anxiety', 'role': 'user'}, {'content': 'Answer: A \nExplanation: (A) OCD # Obsessive-compulsive disorder (OCD) is a psychiatric anxiety disorder most commonly characterized by a subject\'s obsessive, distressing, intrusive thoughts and related compulsions (tasks or "rituals") which attempt to neutralize the obsessions.# Obsessions are defined by:> Recurrent and persistent thoughts, impulses, or images that are experienced at some time during the disturbance, as intrusive and inappropriate and that cause marked anxiety or distress.> Thoughts, impulses, or images are not simply excessive worries about real-life problems.> Person attempts to ignore or suppress such thoughts, impulses, or images, or to neutralize them with some other thought or action.> Person recognizes that the obsessional thoughts, impulses, or images are a product of his or her own mind, and are not based in reality.> Tendency to haggle over small details that the viewer is unable to fix or change in any way. This begins a mental pre-occupation with that which is inevitable.# Compulsions are defined by:> Repetitive behaviors or mental acts that the person feels driven to perform in response to an obsession, or according to rules that must be applied rigidly.> The behaviors or mental acts are aimed at preventing or reducing distress or preventing some dreaded event or situation; however, these behaviors or mental acts either are not connected in a realistic way with what they are designed to neutralize or prevent or are clearly excessive.', 'role': 'assistant'}]