Choose the option that correctly sequences the following sentences.

1. Manufacturers and assemblers dump defective pieces and they produce 1,050 tonnes of electronic scrap annually.

2. The problem may not be alarming since India has a robust second-hand market for most electronic gadgets.

3. Though data on e-waste is not easily available, Toxics link, an NGO focusing on toxicity-related issues, estimates that 1.38 million computers are junked every year in India.

4. There are 85 million TV sets, 20 million mobile handsets and nine million computers in the country.

5. Not to mention other electronic gadgets like television sets and audio systems that are routinely junked.