Final answer:
The correct OSHA precaution for administering medicated nose drops is to wash hands before and after the procedure and to wear gloves as a protective barrier. Masks, eyewear, or gowns may not be necessary for this task unless required by the healthcare facility or the patient's infection status.
Step-by-step explanation:
The appropriate OSHA precaution for administering medicated nose drops to a patient is to ensure personal protective equipment (PPE) is used correctly to prevent contamination or infection. According to OSHA standards and guidelines for handling potentially infectious materials, the most essential step is hand washing before and after the procedure. In addition, wearing gloves would be important to protect against contact with bodily fluids. Although a mask, protective eyewear, and a disposable gown could be part of standard precautions for other procedures, they may not be necessary for administering nose drops unless stipulated by specific institutional policies or the patient is known to be infectious. Therefore, the most appropriate precaution mentioned is D. Wash hands before and after the procedure.