This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Eating Disorders, Subject name: Psychiatry
[{'content': 'Which of the following features is least characteristic of Anorexia Nervosa? \nSelect and explain. \nA. Low self esteem, B. Extreme fear of weight gain, C. Restricted energy intake, D. Disturbed body image perception', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Essential features of anorexia nervosa: * Persistent energy intake restriction * Intense fear of gaining weight or of becoming fat * A disturbance in self perceived weight or shape', 'role': 'assistant'}]