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. Paints 4. Hair oils and cosmetics Select the correct answer using the codes given below:
- A1, 2 and 3 only
- B1 and 3 onlyCorrect
- C2 and 4 only
- D1, 2, 3 and 4
Explanation
The correct answer is B because smelting units and paints are primary documented sources of lead exposure. Smelting units release lead into the air and soil during the processing of metals. Paints, especially older or industrial varieties, contain lead pigments and drying agents that become hazardous when they peel or turn into dust.
Regarding the other options, modern pencils do not contain lead; they use graphite, which is a form of carbon. While some low quality traditional cosmetics like kajal or sindoor may contain lead, general hair oils and standard modern cosmetics are not classified as primary sources of lead poisoning in the context of this specific environmental health question. Therefore, statements 1 and 3 are the most accurate sources.
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