<prompt> Recurrent thoughts of doing something are known as?ObsessionCompulsionPreoccupationConfabulations  <response>: Ans. is a i.e. Obsession Repetitive irresistible thoughts - Obsession. Repetitive purposeful behavior work doing - compulsion OCD is an anxiety disorder which is characterized by recurrent, unwanted thoughts Obsessions and repetitive behaviors compulsions. Patient tries to resist against it but is unable to do so which leads to marked distress or anxiety.Obsessive compulsive disorder PCD OCD is an anxiety disorder which is characterized by recurrent, unwanted thoughts Obsessions and repetitive behaviors compulsions. An obsession has following characteristic : -i An idea, impulse or image which intrudes into the conscious awareness repeatedly.ii It is recognized as ones own ideas, impulse or image but is perceived as egoalien foreign to ones personality.iii It is recognized as irrational and absurd insight is presents Patient knows about disorder.iv Patient tries to resist against it but is unable to do so which leads to marked distress or anxiety. A compulsion has following characteristics : -i It is repetitive, purposeful form of behavior is carried out because of strong feeling of compulsion to do so.ii It usually follows an obsession.iii Its goal is to prevent or reduce the anxiety or stress caused by obsession however it do not always succeed in doing so.iv It is irrational or excessive and not realistic.v Insight is present. A patient with OCD may have an obsession, a compulsion or both mostly patients have both. A patient with OCD realizes the irrationality of the obsession and experiences both the obsession and the compulsion as ego-dystonic unwanted behavior. The person is preoccupied with details rules, list order, organization or schedules to the extent that the major point of activity is lost. The person shows perfectionism that interferes with task completion e.g., unable to complete project because his own overtly strict standard are not met. 