A reasonable conclusion to be drawn from these data is:
a. Genetic factors are unimportant in the etiology of schizophrenia
b. The data suggest a potentially important genetic component
c. The incidence of schizophrenia within relative pairs is highest in monozygotic twins
d. The prevalence of schizophrenia within relative pairs is highest in monozygotic twins
e. Twins are less likely to have schizophrenia than are ordinary siblings
Answer: b. The data suggest a potentially important genetic component