This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Social & Preventive Medicine
Which among the following is the most common mode of lead poisoning? 
Select and explain. 
A. Ingestion, B. Dermally, C. Inhalation, D. None of the above
C: Inhalation
Answer: C: Inhalation 
Explanation: 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.