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. Smelling units2. Pens and pencils3. Paints4. Hair oils and cosmeticsSelect the correct answer using the codes given below:

Lead, ingested or inhaled, is a health hazard. After the addition of l

1.	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. Smelling units2. Pens and pencils3. Paints4. Hair oils and cosmeticsSelect 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
Answer» C. 2 and 4 only