Consider the following statements :

1. Adenoviruses have single-stranded DNA genomes whereas retroviruses have double-stranded DNA genomes.

2. Common cold is sometime caused by an adenovirus whereas AIDS is caused by a retrovirus.

Which of the statements given above is/are correct?  

Magnetite particles, suspected to cause neurodegenerative problems are generated as environmental pollutants from which of the following?

1. Brakes of motor vehicles

2. Engines of motor vehicles

3. Microwave ‘Stoves within homes

4. Power plants

5. Telephone lines

Select the correct answer using the code given below.