With reference to lead poisoning, match List I (Agent) with List II (Amount) and select the correct answer using the codes given below the list.
| List I (Agent) | List II (Amount) |
|---|
| A. Coproporphyrin in urine | 1. > 70 mcg/100 ml |
| B. Aminolevulinic acid in urine | 2. > 5 mg/L |
| C. Lead in urine | 3. > 150 mcg/L |
| D. Lead in blood | 4. > 0.8 mg/L |