This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Miscellaneous, Subject name: Medicine
[{'content': 'In a case of lead poisoning the levels of which is elevated? \nSelect and explain. \nA. Delta amino levulate, B. Haem, C. Bilirubin, D. Motor conduction', 'role': 'user'}, {'content': 'Answer: A \nExplanation: (A) Delta amino levulate > Lab tests may reveal a normocytic, normochromic anemia, basophilic stippling, an elevated blood protoporphyrin level (free erythrocyte or zinc), and motor delays on nerve conduction', 'role': 'assistant'}]