Ganser syndrome is a feature of

Dissociative Disorders Ganser's syndrome ( hysterical pseudodementia) is commonly found in prison inmates. The characteristic feature is vorbeireden, which is also called as 'approximate answers'. The answers are wrong but show that the person understands the nature of the question asked. For example; when asked the colour of a red pen, the patient calls it blue. Ref: A Sho Textbook of Psychiatry, Niraj Ahuja, 7th Edition, pg. no. 102