The correct answer is:
She would be exempt if her delusion prevented understanding the wrongfulness of her acts.
Section 78 of the Criminal Procedure Act in South Africa addresses the mental state of an accused at the time of the offense. If a person genuinely believes that their actions are justified due to a delusion—such as believing their murders were divinely ordained—it could be argued that they did not have the capacity to understand the wrongfulness of their actions, which could lead to them being found not guilty by reason of mental illness.