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.

Correct Option: 1, 2 and 4 only

Magnetite nanoparticles, which are linked to neurodegenerative disorders when inhaled, are toxic air pollutants generated through high-temperature friction and combustion processes. These include vehicular brake pad wear (Statement 1), combustion exhaust from motor vehicle engines (Statement 2), and emissions from thermal power plants (Statement 4). Indoor microwave stoves and telephone lines do not generate airborne magnetite particles.