Final answer:
The correct needle gauge and length for a 2-inch tissue fold is a 22G, 2-inch needle at a 90-degree angle to ensure proper medication delivery into the tissue.
Step-by-step explanation:
The question pertains to the appropriate needle gauge and length for an injection in a 2-inch tissue fold. The correct choice would be: a) 22G, 2 inches, 90 degrees. This is because, for a deep subcutaneous injection into a 2-inch tissue fold, a 2-inch needle is typically used to ensure the medication is delivered into the tissue. The 22 gauge is thick enough to administer most subcutaneous medications, and a 90-degree insertion angle is common for a deep injection into a thick tissue fold to ensure the needle reaches the desired depth.