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Who assumes all the responsibilities of both the sponsor and the investigator in a clinical study?

  1. FDA

  2. Drug Supplier/Manufacturer

  3. Sponsor

  4. Sponsor-investigator

The correct answer is: Sponsor-investigator

The sponsor-investigator is responsible for performing both the duties of the sponsor and the investigator in a clinical study. This means they are responsible for conducting the study, ensuring the safety and well-being of the participants, and adhering to all regulatory requirements and guidelines. The other options, such as the FDA, drug supplier/manufacturer, and sponsor, may have some involvement in the study but ultimately do not assume all the responsibilities of both the sponsor and the investigator.