Final answer:
A vertical laminar flow hood is used over a horizontal one for the preparation of parenteral formulations that require a higher level of sterility or operator protection, such as the chemotherapy drug bleomycin.(option b)
Step-by-step explanation:
The use of a laminar flow hood is crucial for preparing parenteral formulations in a healthcare setting to ensure a sterile environment. The choice between a vertical and horizontal laminar flow hood depends on the specific requirements of the medication being prepared. In this question, the students asked which formulation would prefer a vertical flow hood over a horizontal one.
A vertical flow hood is generally preferred for preparations that are more susceptible to contamination or that require additional protection for the operator. This typically includes medications that are more potent or hazardous, such as certain chemotherapy drugs.
Among the options provided, bleomycin, which is an antineoplastic agent used in chemotherapy, would be the appropriate answer. The administration of bleomycin via a parenteral route when prepared in a vertical laminar flow hood reduces the risk of airborne contaminants being introduced into the drug product and also provides protection for the operator from exposure to the drug.
Hence, the answer is option b