A 48 year old woman always socially withdrawn has stopped going out of the house. She is afraid to socialize because she fears that people will criticize her. What is the most probable diagnosis?

The key is C. Social anxiety. [Social anxiety disorder is a type of complex phobia. This type of phobia has a disruptive or disabling impact on a person's life. It can severely affect a person's confidence and self-esteem, interfere with relationships and impair performance at work or school].