A schizophrenic patient sometimes lapses into a phase during which she becomes unresponsive and stiff.In this state her body becomes rigid, and she sits for hours by herself in a sort of stupor.In the context of schizophrenia, she is experiencing

A) mania.
B) catatonia.
C) dissociative amnesia.
D) psychosis.

Catatonia

A psychiatric condition marked by abnormal movements and behaviors, including stiffness, mutism, and stupor.

Unresponsive

The condition or quality of not reacting or responding to external stimuli or inputs.

Stupor

A state of near-unconsciousness or insensibility, often resulting from illness or intoxication.