Which of the following is NOT a feature of Illness Anxiety Disorder?

Illness Anxiety Disorder is characterized primarily by a preoccupation with having or acquiring a serious illness, alongside high levels of anxiety about health and excessive health-related behaviors. Option B identifies "somatic symptoms are present and severe" as a feature, which aligns more closely with Somatic Symptom Disorder rather than Illness Anxiety Disorder. In the latter, individuals may experience mild or even no somatic symptoms at all, as their primary concern lies in the anxiety about health and the belief they have or will develop a serious illness.

The disorder's hallmark is not the presence of severe physical complaints but rather the overwhelming anxiety concerning health issues and the behavioral responses that stem from this anxiety. Hence, identifying somatic symptoms as a prevalent feature leads to confusion with another disorder and is not representative of Illness Anxiety Disorder, making it the correct answer here.