Final answer:
The amount of base in a 30mg tablet of pseudoephedrine is the total amount of active drug, which is 30mg. This is because medication dosages indicated on the package represent the amount of the active ingredient.
Step-by-step explanation:
The question asks about the amount of base (active ingredient) in a 30mg tablet of pseudoephedrine. In the context of medication and dosages, the amount stated typically refers to the total amount of the active drug present in the tablet. Therefore, if a tablet is said to contain 30mg of pseudoephedrine, this means that there is 30mg of the pseudoephedrine base in the entire tablet.
It's important to clarify that the weight specified on medication packaging represents the weight of the active ingredient itself, without considering the weight of other components such as fillers or binders that may be part of the tablet. Hence, the correct answer to how much base is in a 30mg tablet of pseudoephedrine is 30mg, which corresponds to option d).