Which of the following is a positive symptom of schizophrenia?

A) Restricted affect
B) Hallucinations
C) Anhedonia
D) Avolition

Hallucinations are a positive symptom of schizophrenia. Positive symptoms involve the presence of something that is not normally present, such as hallucinations or delusions. Restricted affect refers to a reduction in the display of emotions, anhedonia is the inability to experience pleasure, and avolition is a negative symptom that involves a reduction or absence of motivation.