People with personality disorder will display a rigid, pattern of inner experience and outward behavior that weaken their sense of self, emotional experiences, goals and capacity for intimacy.
An individual with narcissistic personality disorder are characterized by the need for admiration, lack of empathy on others, and expects to be recognized as superior without corresponding achievement.
Social interaction is not a problem for the narcissistic personality disorder.
Hence the options b, c and d are not correct.
The main issue for people suffering with narcissistic disorder is the fragile self-esteem and always looks for the higher positions and grandiose sense of self importance.
Hence the correct option is .