People with Hypochondriasis, Like People with Obsessive-Compulsive Disorder, Have Intrusive

People with hypochondriasis, like people with obsessive-compulsive disorder, have intrusive thoughts that cause them anxiety. The major difference is

A) in hypochondriasis, the thoughts are seen as inappropriate and alien, in obsessive-compulsive disorder the intrusive thoughts are seen as appropriate and reasonable.
B) in hypochondriasis, the thoughts are about one disease only, in obsessive-compulsive disorder the thoughts are about multiple diseases.
C) in hypochondriasis, the person knows the thoughts are coming from their own head and in obsessive- compulsive disorder, the person believes the thoughts are coming from someone else.
D) in hypochondriasis, the thoughts are seen as appropriate and reasonable, in obsessive-compulsive disorder the intrusive thoughts are seen as inappropriate and alien.