The situation in which protective eyewear is required is:

Choice A rationale

While immune globulin can be given to non-immune individuals exposed to chickenpox, the baby already has some protection because the mother has naturally acquired immunity. Hence, giving immune globulin is not necessary in this case.

Choice B rationale

Although the infant has not been immunized against chickenpox, the baby still receives passive immunity through the mother's breast milk. The antibodies transferred via breastfeeding provide some level of protection to the baby.

Choice C rationale

The mother's immunity against chickenpox, acquired from a past infection, remains effective throughout her life. This immunity is transferred to the baby through the placenta during pregnancy and continues through breastfeeding, providing protection to the infant.

Choice D rationale

The mother’s naturally acquired immunity from her childhood infection provides antibodies against chickenpox that she passes on to the baby through the breast milk. This passive immunity helps protect the baby from the infection.

Choice A rationale

Dressings are typically sterilized using steam or other standard methods, not ethylene oxide gas, which is reserved for materials that are sensitive to heat and moisture.

Choice B rationale

Surgical instruments are commonly sterilized using steam autoclaving, which is highly effective and efficient.

Choice C rationale

Floors and walls do not require sterilization with ethylene oxide gas; standard cleaning and disinfection methods are sufficient.

Choice D rationale

Heat-sensitive items require ethylene oxide gas sterilization because it is effective at low temperatures without damaging delicate materials.