This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Psychiatry
In psychoanalytic terms, obsessive-compulsive disorder is fixed at - 
Select and explain. 
A. Oedipal stage, B. Genital stage, C. Oral stage, D. Anal stage
D: Anal stage
Answer: D: Anal stage 
Explanation: OCD results from a regression from the oedipal phase to anal phase of psychosexual development, i.e. In OCD fixation occurs in anal stage (Note - Regression is reversion from higher level of development to lower level of development).