Cause to effect progression is seen in all EXCEPT:
ANSWER: (A) Case control studyREF: Park 20th edition page 67 Repeat in December 2011Cause to effect (disease) = prospective study (cohort study)Effect (disease) to cause = retrospective study (case control study)RCT and ecological studies are also prospective studies
Case control study
Ecological study
Cohort study
Randomized control trial
Epidemiological Study