Ateacher is excessively neat, always insists on washing the blackboard before and after class, and always cleans the classroom after his lectures. according to freudian theory, the teacher may be suffering from a(n)

A. Obsessive Compulsive Disorder (OCD)

Based on the Freudian theory, a person or a teacher in the problem who is excessively and always insists on washing and cleaning the blackboard before and after his class may be suffering from an obsessive compulsive disorder. People with this type of disorder have the need to check on everything again and again, may it be in the house or in the office.  These annoying thoughts are referred to as obsessions while the desire to repeat the acts towards its obsessions is called compulsion. A person can be obsessed on dirt, organization and even smell.

Give sentence number 12