Final answer:
Excretion is the process that allows for the removal of inactive medication compounds. Water-soluble drugs can be excreted in the urine through various processes, such as glomerular filtration, tubular secretion, or tubular reabsorption. Some drugs can also be eliminated through carrier proteins. So the correct answer is Option A.
Step-by-step explanation:
The process that allows for the removal of inactive medication compounds is excretion. Water-soluble drugs can be excreted in the urine through processes such as glomerular filtration, tubular secretion, or tubular reabsorption. Some drugs can be eliminated through carrier proteins that enable their secretion into the tubule lumen. For example, specific carriers eliminate basic or acidic drugs. Inactive compounds that are not excreted can accumulate in the body, potentially causing undesirable effects.