In a study of identical twins by the National Institute of Mental Health, when one twin had schizophrenia and the other did not, the schizophrenic twin always showed reduced activity in which lobe of the brain when compared to the unaffected co-twin?
A. parietal
B. medulla
C. occipital
D. frontal

The preferable option will be - D.

D. Frontal lobe.

Explanation:

One of the parts of the brain is the frontal lobe. It controls important cognitive skills in humans, such as reasoning, planning, language, long term memory, impulse control, judgment, emotional expression, problem-solving, motor function, initiation, and social or sexual behaviors. It controls our personality and gives us the ability to communicate. The causes of schizophrenia -

The exact cause is unknown. According to the experts, a combination of factors such as physical, psychological, environmental, and genetic factors together can lead a person towards schizophrenia. A stressful or emotional life event can lead the person towards schizophrenia.

Symptoms of schizophrenia include mainly hallucinations, delusions, feeling agitated, etc. A child born with schizophrenia is a very rare case.

~potters6/te801/biology/biounits/respiration.htm

Idont know but good luck; )