Final answer:
The PillCam was approved by the FDA in 2001, which is answer option (4). The FDA oversees the approval of medical devices and drugs, ensuring their safety and efficacy for public use.
Step-by-step explanation:
The PillCam, a revolutionary tool in the field of diagnostic medicine, particularly for its ability to provide minimally invasive imaging of the gastrointestinal tract, was approved by the U.S. Food and Drug Administration (FDA) in 2001. Therefore, the correct answer is (4) 2001.
The FDA's role is to ensure the safety and efficacy of drugs and medical devices in the United States. The historical context shows that the FDA has been approving various medical innovations since its formation, each having a significant impact on public health and medical practices. While approvals of new antimicrobials have declined, as per the intervals shown, the approval of the PillCam stands out as a milestone in the early 21st century.