Final answer:
Epigastric pain and anemia are symptoms typically associated with hookworm infection, distinguishing it from other options like pinworms, tapeworms, and trichinosis provided in the question.
Step-by-step explanation:
Epigastric pain and anemia are possible symptoms of a parasitic infection caused by hookworms. These nematodes, specifically Necator americanus and Ancylostoma duodenale, can cause a range of symptoms, including abdominal pain, diarrhea, loss of appetite, weight loss, fatigue, and anemia. Hookworms attach to the lining of the small intestine and feed on the host's blood, which can lead to iron deficiency anemia. On the other hand, pinworms, tapeworms, and trichinosis are also parasitic infections each with distinctive symptoms and modes of transmission, but do not typically cause epigastric pain and anemia together as hookworms do. Therefore, the correct answer to the question is C. Hookworms.