Which of the following is a sign of catatonia?

• A. Delusions
• B. Anxiety
• C. Tremor
• D. Mutism

Answer: (D)

Catatonia is a motor‑behavioral syndrome characterized by reduced movement and speech, along with abnormal responses to the environment. Mutism fits this pattern as a specific sign, describing markedly limited or absent speech despite the ability to speak. It often appears with stupor or decreased responsiveness and is one of the classic features clinicians look for when catatonia is suspected, making it the best choice among the options.

Delusions are fixed false beliefs and reflect psychosis rather than the motor‑behavioral disturbance of catatonia. Anxiety is a non-specific affective state, not a defining catatonic sign. Tremor is an involuntary rhythmic movement and does not typify catatonia.