Which of the following are not production methods for carbon nanotubes? 1. Electric arc discharge method2. Laser vaporization method3. Czochralski method4. Metallization method Select the correct answer using the code given below:

Fibers produced by dispersing nano-sized fillers evenly inside a polymer fiber matrix are known as:

During the wet chemical synthesis of silver nanoparticles, which of the following safety measures is most critical to prevent hazardous exposure and ensure containment?