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A researcher is examining the impact of a new drug on the duration of the flu...

A researcher is examining the impact of a new drug on the duration of the flu (from onset of the symptoms to full recovery ). The researcher recruited 200 patients from a local hospital who confirmed the flu cases. Participants were randomly assigned to either receive the new drug or placebo. Duration of flu symptoms was tracked for all the participants . Which type of research design is the best classified as ?

  1. Ecologic
  2. Prospective Cohort
  3. Cross sectional
  4. Case control
  5. Randomized Controlled trial
math   Statistics-And-Probability   
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