Final answer:
d) Intravenous immunoglobulin (IVIG). In IgA deficient patients, intravenous immunoglobulin (IVIG) is used to prevent anaphylaxis.
Step-by-step explanation:
In IgA deficient patients, intravenous immunoglobulin (IVIG) is used to prevent anaphylaxis. IVIG is a treatment that provides the patient with antibodies to help protect against infections. It can also help prevent anaphylactic reactions in patients who lack IgA antibodies.