Belief that a major catastrophe will occur.

• A. Delusions
• B. Nihilistic Delusions
• C. Bizarre specifier
• D. Thought Insertion

Answer: (B)

Belief that a major catastrophe will occur fits in nihilistic delusions. Nihilistic delusions are fixed, false beliefs that something fundamental about reality is missing or doomed—such as the world ending, life not existing, or a catastrophic event imminent. This content is not just a fear or worry; it’s a conviction held despite evidence and not shared by others.

This helps distinguish it from a general delusion as a type of content, and from thought insertion, which involves thoughts that are said to be placed in one’s mind by an external source. The bizarre specifier describes how unusual the content is in form, not its specific theme; a nihilistic delusion can be non-bizarre in form yet still involve a nihilistic, catastrophe-related belief. In clinical practice, recognizing nihilistic delusions points toward psychotic-spectrum disorders and helps guide assessment and management.