Final answer:
When entering an operating room where a laser is used, it's necessary to wear goggles, gloves, and a mask for protection against potential hazards.
Step-by-step explanation:
The type of personal protective equipment (PPE) required when entering an operating room where a laser is being used includes goggles, gloves, and a mask. An answer to the multiple-choice question above would be 4) All of the above. Goggles are crucial for eye protection to prevent damage from laser exposure. Gloves protect the hands from potential contamination and injury, and a mask is necessary to maintain a sterile environment and protect against inhaling harmful substances. In environments where lasers are in use, it's important to adhere strictly to safety guidelines to ensure both patient and medical personnel safety.