Which of the following eating disorders is characterized by extreme thinness, the pronounced fear of becoming fat, and exhibiting endocrine difficulties?

A) Anorexia nervosa
B) Bulimia nervosa
C) Binge eating disorder
D) Eating disorder not otherwise specified
E) Purging

Anorexia Nervosa

An eating disorder characterized by an obsession with food, body weight, and shape, leading to extreme weight loss.

Extreme Thinness

A potentially harmful physical condition characterized by an abnormally low body weight.

Endocrine Difficulties

Medical conditions that arise from problems with the endocrine system, which is responsible for producing and regulating hormones in the body.