ANS:D - 80

Generally, high-pressure boilers are those that operate at pressures greater than 80 kg/cm2, not just 30 kg/cm2. These boilers are designed to handle higher pressures to produce steam efficiently for various industrial applications such as power generation, chemical processing, and manufacturing. The higher pressure allows for the generation of more energy-dense steam, which can be utilized for more demanding processes or for higher efficiency in power generation. Therefore, the correct statement should be: "A high-pressure boiler generates steam at a pressure greater than 80 kg/cm2."