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A prospective cohort study can be distinguished from a case-control by the following:
a) Participants are first categorised based on exposure status in a prospective cohort study, but not in a case-control study.
b) Prospective cohort studies are conducted to investigate rare outcomes whereas case-control studies are used for rare exposures
c) Participants report their exposure in a prospective cohort study but not in a case-control study.
d) Prospective cohort studies have a comparison group, whereas case-control studies do not.