What is the core feature of anorexia nervosa?

Correct option is D

The defining feature of anorexia nervosa is an intense fear of gaining weight or becoming obese, despite being underweight. This fear drives individuals to extreme behaviors to prevent weight gain.
Explanation of options: (a) Binge eating – ❌ More characteristic of bulimia nervosa or binge-eating disorder, not anorexia nervosa. (b) Poor impulse control – ❌ Not a hallmark of anorexia; anorexic individuals usually exhibit high control over their food intake. (c) Tooth staining – ❌ Associated with frequent vomiting in bulimia nervosa, not a typical feature of anorexia nervosa. (d) Fear of becoming obese – ✔ Correct. This is the central psychological issue in anorexia nervosa.