Lead, ingested or inhaled, is a health hazard. After the addition of lead to petrol has been banned, what still are sources of lead poisoning ?

I. Smelting units
II. Pens and pencils
III. Paints
IV. Hair oils and cosmetics

A I, II and III only
B I and III only
C II and IV only
D I,II, III and IV
Answer & Explanation
Option: [B]

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