Tangentiality is NOT a negative symptom of schizophrenia (option c).
Schizophrenia is a mental disorder condition characterized by the loss of reality for individuals suffering from this disease, which may also be associated with the loss of memory in an irreversible way, while tangentially can be defined as thought disturbance where the individual generally digresses to nonessential issues.
This disease condition (schizophrenia medical condition) has different symptoms such as hallucinations, disordered thought and uncontrolled behaviors, which make it a really hard disease and requires control all time in order to avoid dangerous situations that may produce damage to the individual.
Therefore, with this data, we can see that schizophrenia is a medical condition that may cause a very serious disease that is also associated with tangentially but it is not the real problem to have into account for its treatment in proper clinical settings.
Learn more about schizophrenia's medical condition here:
https://brainly.com/question/7201954
#SPJ1