This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Psychiatry
Which of the following is a feature of hypochondriasis? 
Select and explain. 
A. Abnormal preoccupation with abnormal body function, B. Abnormal preoccupation with normal body function, C. Normal preoccupation with abnormal body function, D. Normal preoccupation with normal body function
B: Abnormal preoccupation with normal body function
Answer: B: Abnormal preoccupation with normal body function 
Explanation: In Hypochondriasis, patients are preoccupied with the fear of having a serious disease based on misinterpretation of bodily signs and sensations. This fear persists even in the presence of evidence to the contrary and physician's reassurance or evidence from investigations. Ref: Current Medical Diagnosis and Treatment : Psychiatry 2nd edition chapter 22.