<prompt> Case control study is a type of-Descriptive epidemiological studyAnalytical studyLongitudinal studyExperimental epidemiological study  <response>: Analytical studies include: Ecological or correlational-with populations as unit of study Cross sectional or prevalence-with individuals as unit of study Case control or case reference-with individual as unit of study Coho or followup-with individual as unit of study.refer pg no:62 park 23rd edition 