Answer: Bob may be suffering from paranoid schizophrenia.
Step-by-step explanation:
Paranoid schizophrenia is a condition which is characterized by the delusions and hallucination. The person suffers from confusion of dealing with reality and illusion. It is a chronic or long term psychiatric condition. It makes a person difficult to think properly. It develops the fear, suicidal thoughts and confusion. The symptoms includes disorganized thinking, slow movement, changes in the pattern of sleep, lack of motivation, low sex drive and lack of attention to hygiene.
Bob is suffering from fear and illusion thus the symptoms indicate towards the condition of paranoid schizophrenia.