The thermometer used in common should be washed with soap and water and disinfected with

Correct option is C

Ans. (c)
Sol. A thermometer that is used communally should be disinfected properly to prevent cross-infection. After washing with soap and water, it should be disinfected using Lysol at a strength of 1:20, which is a standard practice in healthcare settings due to its effective germicidal properties.
Explanation of each option:
· (a) Dettol strength 1:20 – Dettol is used as a disinfectant but not recommended at this strength for thermometers.
· (b) Savlon strength 1:20 – Savlon is an antiseptic, mainly for skin, not ideal for thermometers.
· (c) Lysol strength 1:20 – ✅ Correct. Lysol is a widely recommended disinfectant for clinical instruments like thermometers.
· (d) Fairgenol strength 1:20 – Not commonly used or recommended for thermometer disinfection.