where do you use medical instruments primarily?
Options:
- laboratory
- the pyramids of gaza
- music shop
- operating room
- case
Step-by-step reasoning process below:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
Operating room is a room in hospital in which surgical operations are performed. Medical instruments primarily are used in operating room. The answer: operating room.