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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?                                                                                                          (2013)

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

B)         1, 2, 3, 5 and 6

C)         2, 4, 5 and 7                

D)  1, 2, 3, 4, 5, 6 and 7