A client is 5 feet 6 inches tall, weighs 105 pounds, exercises 4 hours per day, and does not engage in any binging or purging behaviors. The client believes that he or she is becoming obese and states, "I'm shocked that you think I'm underweight. You don't understand me." The most likely diagnosis for this client is what?
1. Bulimia nervosa, nonpurging type.
2. Anorexia nervosa, restricting type
3. Anorexia nervosa, binge eating, and purging type
4. Eating disorder not otherwise specified