<prompt> In a prospective study, 1200 patients were randomly selected to study the effect of a new drug. The drug will be given for 5 years and its association with cataract will be studied. What tyepe of study is this?Case control studyCohort studyRandomized clinical trialCross-sectional study  <response>: Refer: K. Parks Textbook of Preventive and Social medicine, 24th edition, pg no: 74, 76, 87THE INFORMATION IN THE QUESTION IS INSUFFICIENT TO CONCLUDEIt may be a Quasi randomized trial or it can be just clinical trial where the patient may serve as his controlSince association is determined, hence it can be indirectly understood as there are 2 groupsThere is an intervention in the study so it is not a case control or cohort study or cross sectional studyThere is no mention of randomization of intervention in the groups which is the heart of RCT 