Which of the following is a common chelating agent used for lead poisoning?

EDTA, or ethylene diamine tetraacetic acid, is commonly used as a chelating agent for lead poisoning. It works by binding to lead in the bloodstream, forming a complex that can be excreted by the kidneys. This process reduces the overall burden of lead in the body and helps alleviate the toxic effects associated with lead exposure.

Atropine is primarily used to treat bradycardia and as an antidote for certain types of poisoning, but it does not have chelating properties. Ibuprofen is a nonsteroidal anti-inflammatory drug (NSAID) used for pain and inflammation, while prednisone is a corticosteroid used to treat inflammatory conditions and does not function as a chelating agent. None of these alternatives would effectively treat lead poisoning, making EDTA the appropriate choice for this condition.