**Question:** Type I Anorexia nervosa is characterized by

A. Restrictive dieting
B. Binge eating and purging
C. Early-onset, rapid weight loss
D. Normal body weight

**Correct Answer:** B. Binge eating and purging

**Core Concept:** Type I Anorexia nervosa is a psychiatric disorder characterized primarily by disordered eating behavior.

**Why the Correct Answer is Right:** Type I Anorexia nervosa is also known as Anorexia nervosa restrictiva, and is defined by the presence of binge eating and purging episodes, either through self-induced vomiting or misuse of laxatives, diuretics, or enemas. These episodes are typically triggered by perceived body image distortion and fear of weight gain, leading to unrealistic concerns about body weight and shape.

**Why Each Wrong Option is Incorrect:**

A. Restrictive dieting (Option A) is a feature of Type II Anorexia nervosa, where patients maintain a significantly low body weight due to intentional food restriction without compensatory behaviors.

B. Binge eating and purging (Option B) is the correct answer, as it represents the primary disturbance in Type I Anorexia nervosa.

C. Early-onset, rapid weight loss (Option C) is a feature of both Anorexia nervosa subtypes, but does not specifically differentiate Type I (restrictiva) from Type II (bulemic) subtypes.

D. Normal body weight (Option D) is a misconception, as patients with Type I Anorexia nervosa typically have a low body mass index (BMI), despite engaging in purging behaviors.

**Clinical Pearl:** Anorexia nervosa is a complex disorder that involves not only dietary restrictions and body image concerns but also psychological factors, such as anxiety, depression, and obsessive-compulsive traits. It is essential for healthcare professionals to recognize the full spectrum of manifestations in these patients and provide comprehensive care, addressing both physical and mental health needs.