A 35 year old patient has been diagnosed with schizophrenia. He mimics the doctors and attendants – doing the same physical actions as them. What symptom does this patient have?

The key is A. Echopraxia. [Echopraxia is the involuntary repetition or imitation of another person's actions. Similar to echolalia, which is the involuntary repetition of sounds and language. Echopraxia has long been recognized as a core feature of Tourette syndrome, and is considered a complex tic, but it also occurs in autism spectrum disorders, schizophrenia and catatonia].