<prompt> Useful screening test for lead is measurement of:Coproporphyrin in UrineAmino-levulinic acid in urineLead in bloodLead in Urine  <response>: Diagnosis of lead poisoning: Laboratory parameters Remark Coproporphyrin in Urine CPU 150 mcgL Exposure to lead Amino levulinic acid in Urine ALAU 5 mgl Indicates lead absorption Lead in blood 70 mcg100 ml Clinical symptoms appear Lead in Urine 0.8 mgl Lead exposure and absorption Basophilic stripling of RBC;s Punctate basophilia Ref: Park 25th edition Pgno: 845 