Final answer:
c) Liver
Drug metabolizing enzymes are primarily found in the liver, which is responsible for converting drugs into their metabolites for elimination from the body.
Step-by-step explanation:
Drug metabolizing enzymes are largely found in the liver, where they play a critical role in breaking down substances, including medications, so that they can eventually be eliminated from the body. These enzymes, like Catechol-O-Methyl-Transferase (COMT) and Mono-Amine Oxidase (MAO), convert drugs into their metabolites.
The liver is the key organ for drug metabolism, making it the correct answer to the question "Where can drug metabolizing enzymes be found?" Although enzymes can also be present in other parts of the body, such as the kidneys and the intestine, the majority of drug metabolism occurs in the liver.