Psychiatry A 40years old male always doubts his neighbor and fights with him without any reason. Rest behavior is normal. This can be due to? A Delusion of grandiose B Nihilistic delusion C Delusion of persecution D Delusion of infidelity 💡 Explanation A 40years old male always doubts his neighbor and fights with him without any reason. Rest behavior is normal. This can be due to? ✓ Correct Answer: C. Delusion of persecution