Q. 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.

[A] 1, 3, 4, 6 and 7 only

[B] 1, 2, 3, 5 and 6 only

[C] 2, 4, 5 and 7 only

[D] 1, 2, 3, 4, 5, 6 and 7

Answer: B