Which of the following cannot be reliably used for handwashing?

# Which of the following cannot be reliably used for handwashing?

A. Lysol

B. Cresol

C. Isopropyl alcohol

D. Chlorhexidine

The correct answer is A. Lysol.

Lysol is a phenolic compound derived from coal tar and is highly toxic to humans. It is recommended for disinfection of surfaces in hospital. 

These can be reliably used for handwashing: 

- Chlorhexidine

- Alcohols (isopropyl alcohol, ethyl alcohol)

- Iodine

- Cresol

- Chloroxylenol (dettol)

- Hexachlorophane

- Tincture of iodine

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