What differentiates a narcissist from someone high in self-esteem?

Question

Quizplus · Accepted Answer

Narcissists lack an interest in others, whereas someone with high self-esteem may still have an interest in others and their well-being.

Answer: D 
 These terms are not synonymous, as narcissism refers to a specific personality disorder characterized by a lack of empathy and an inflated sense of self-importance, while self-esteem refers to one's general sense of self-worth and confidence.

What Differentiates a Narcissist from Someone High in Self-Esteem