During the examinations and everyday orthopaedic manipulations a dentist uses a dental mirror. What is the way of its sterilization?

Answer options

1. In the dry heat sterilizer at 180°C for 10 minutes
2. In the 0,5% ethyl chloride solution for 20 minutes
3. In the triple solution for 30 minutes
4. In the 6% hydrogen peroxide solution for 6 hours
5. In the 0,01% chloramine solution for 10 minutes