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
Patient of contamination phobia was asked by therapist to follow behind him and touch everything he touches. During process therapist kept talking quietly and calmly to the patients. The patient was asked to repeat the procedure twice daily. The procedure is: 
Select and explain. 
A. Flooding, B. Modeling, C. Positive reinforcement, D. Aversion therapy
B: Modeling
Answer: B: Modeling 
Explanation: This is an example of paicipant modeling in which patient learns by observation and imitation of therapist. Positive reinforcement- Increase in frequency of behavior because of positive consequences. Flooding-Type of behavioral therapy in which maximum stimuli is given in first response Aversion therapy- It uses classical conditioning Helpful in treatment of unwanted behaviors such as paraphilias