Being at least 15% underweight is a symptom of anorexia nervosa. So, the option A is correct.
Anorexia nervosa may be defined as an emotional disorder that produces an intense fear of gaining weight. It involves the desire to lose weight through dieting or fasting.
The symptom of anorexia also includes bingeing through excessive exercise. Anorexia nervosa changes the psychology of your brain and you may feel like overweight or have more fat even if you are in the state of being underweight.
Therefore, being at least 15% underweight is a symptom of anorexia nervosa. So, option A is correct.
To learn more about Anorexia nervosa, refer to the link:
https://brainly.com/question/681332
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