Which among the following is the most common mode of lead poisoning?

Lead poisoning (Plumbism) may occur in 3 ways: Inhalation - Most cases of industrial lead poisoning is due to inhalation of fumes and dust of lead or its compounds. Ingestion - Small quantities of lead trapped in the upper respiratory tract may be ingested. Contaminated hands may also lead to ingestion. Skin - Only organic lead (e.g., tetraethyl lead) is absorbed dermally. Ref: Park's Textbook of Preventive and Social Medicine, 19th edition, Page 662.