People sometimes remain motionless and silent for long stretches of time in this condition. Which of the following disorder is being discussed here?

catatonic stupor

People with schizophrenia also show psychomotor symptoms. They move less spontaneously or make odd grimaces and gestures. These symptoms may take extreme forms known as catatonia. People in a catatonic stupor remain motionless and silent for long stretches of time. Some show catatonic rigidity, i.e. maintaining a rigid, upright posture for hours. Others exhibit catatonic posturing, i.e. assuming awkward, bizarre positions for long periods of time.