The civil commitment is involves a legal process and it is essential to provide treatment to a psychic patient as they feel themselves that they may commit threatful activity to other or themselves.
Criminal commitment involves isolation of mental ill patient form society as they feel guilty with mental illness, they feel not guilty (mainly patients with variety of psychological illness, who need a legal decision) and incompetent to stand trial thus, they may commit criminal conviction.
Thus, the options (b), (a) and (d) are incorrect.
Criminal commitment involves isolation of mental ill patient form society as they feel guilty with mental illness.
Therefore, the correct option is – c). is under criminal commitment.