The correct answer is letter B.
Schizophrenia is a mental disorder that has as characteristic abnormal behavior, incomprehensible speech and decreased ability to understand reality.
Considering all alternatives, the one that doesn't comprehend some of the symptons of this disease is filtering out information that is unnecessary.
Sensing things that are not real, having unusual beliefs not based on facts and having the inability to focus on particular information are all correct symptons of the disease, since people with developed schizophrenia often present a distorced vision of reality through drawings, for example, a strong belief in things that aren't real, and difficulty paying attention in one thing at a time.