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

1. Smelting Units
2. Pens and pencils
3. Hair oils and cosmetics

Select the correct answer using the codes given below:
(a) 1, 2 and 3 only
(b) 1 and 3 only
(c) 2 and 4 only
(d) 1, 2, 3 and 4


The correct answer is option b.1 and 3 only.
0 0 0
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