UPSC Civil Services 2013 Prelims General Studies Paper I

Question : 4 of 100

Marks: +1, -0

Due to improper/ indiscriminate disposal of old and used computers or their parts, which of the following are released into the environment as e-waste?
1. Beryllium
2. Cadmium
3. Chromium
4. Heptachlor
5. Mercury
6. Lead
7. Plutonium
Select the correct answer using the codes given below.