I am a movie director and I just received the following movie plot. Could you help me answer this question? If not, let me know by writing "Not answerable". Plot title: Krazzy 4 Movie plot: Raja (Arshad Warsi) has a temper problem, Gangadhar (Rajpal Yadav) has an obsession of freedom, Dr. Mukherjee (Irrfan Khan), is a clean freak and Dabboo (Suresh Menon), has not spoken in years. Dr. Sonali (Juhi Chawla) is treating all four of them. While Raja is diagnosed with Intermittent Explosive Disorder due to his sudden anger at the slightest provocation, schizophrenic Gangadhar is living in the past where he shares friendships with Jawaharlal Nehru, Mahatma Gandhi, Lokamanya Tilak and Sardar Vallabhbhai Patel. He seems busy in fighting for the country's freedom, which was achieved long back. Dr. Mukherjee is a perfect doctor and always keeps himself tidy and prim. He has been diagnosed with Obsessive Compulsive Personality Disorder. Dabboo suffers from Selective Mutism. He has not spoken for years, and appears frightened all the time. He is loved by one and all. Dr. Sonali negotiates with the mental hospital's top doctors to allow her to take the four of them for a cricket match between India and England which is being held on Independence Day. She eventually manages to get permission and the four of them get ready. The following morning, she takes them to the match and on the way stops at her clinic to pick up some important papers. She tells the group to stay in the car. After a while, Dabboo gets out of the car and goes to a spot nearby to pee. From there, he watches Dr. Sonali being kidnapped by thugs. He notices one of the faces as a thug removes his mask. Dabboo then goes back to the car where his friends realize that something is wrong from the expression on his face, but soon ignore it as Dabboo cannot speak. As time goes on, the four become bored. One by one, all of them except Dabboo get out of the car to look for Dr. Sonali. They split up and go to different places. Meanwhile, Dr. Sonali is being bribed to sign papers for declaring a criminal called Rana as insane at a hospital at 11 am the following day. As Raja searches for her, he passes by a store where there is a TV set showing a news... My question: What was Dr. Mukherjee diagnosed with?
A:
Obsessive Compulsive Personality Disorder