This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Forensic Toxicology - Concepts, Statutes, Evidence, and Techniques, Subject name: Forensic Medicine
5-year-old male brought to casualty by his mother because of episode of sudden vomiting. He has been behaving strangely according to mother. Laboratory findings showed microcytic hypochromic anemia with the above finding. The most probable poisoning is: 
Select and explain. 
A. Chronic arsenic poisoning, B. Chronic lead poisoning, C. Chronic mercury poisoning, D. Chronic copper poisoning
B: Chronic lead poisoning
Answer: B: Chronic lead poisoning 
Explanation: Ans. (B). Chronic lead poisoningThe above blood picture shows basophilic stippling of RBCs.Basophilic stippling (dots in the red blood cells) is due to the inhibition of 5 pyrimidine nucleotidase enzyme resulting in aggregation of ribosomes.Other findings in blood: Microcytic hypochromic anemia, anisocytosis, poikilocytosisBasophilic stippling is also seen in megaloblastic anemia.