1. 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

Correct Answer :

1, 2, 3, 5 and 6 only