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.
1
1, 3, 4, 6 and 7 only
2
1, 2, 3, 5 and 6 only
3
2, 4, 5 and 7 only
4
1, 2, 3, 4, 5, 6 and 7