The disorder that have odd behavior, thoughts, perceptions and speech pattern is called schizotypal personality disorder. Here, Horace could have schizotypal personality disorder.
In this type of personality disorder, the person can be felt eccentric. They can also have problems in forming relationships and understanding the social cues.
It is mainly caused because of the following reasons:
Here, Horace is having odd collections and seems to be eccentric also emotionally not engaged, etc. It can be a schizotypal personality disorder.
Thus, the correct option is D.
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