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
In a case of lead poisoning the levels of which is elevated? 
Select and explain. 
A. Delta amino levulate, B. Haem, C. Bilirubin, D. Motor conduction
A: Delta amino levulate
Answer: A: Delta amino levulate 
Explanation: (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