Final answer:
Option C, the delusion that one's body is diseased or infested, is the correct answer as it describes the somatic type of delusional disorder. This condition involves a strong false belief about bodily functions which is not confirmed by medical evidence.
Step-by-step explanation:
The somatic type of delusional disorder is characterized by the presence of delusions involving bodily functions or sensations. Specifically, individuals with this type of delusional disorder have the false and unfounded belief that their body is diseased, has a physical defect, or is infested when, in reality, there is no medical evidence to support their concerns. This type of delusion can lead to significant distress and may result in the individual seeking excessive medical testing or procedures.
Among the options provided, the only statement that describes the somatic type of a delusional disorder is:
C. The delusion that one's body is diseased or infested. The other options describe different types of delusions: A describes the jealous type, B the erotomanic type, and D the persecutory type.
Option C is correct for the somatic type of delusional disorder, where an individual believes their body is diseased or infested despite medical evidence to the contrary. Other options correspond to different subtypes of delusional disorder.