Correct option is A
Reinforced insulation is a type of electrical insulation that is designed to provide a level of protection equivalent to double insulation. It is a single layer of insulation that is stronger and more reliable than basic insulation, ensuring that the protection it offers is equivalent to what would be provided by two layers of standard insulation. This type of insulation is commonly used in electrical devices to ensure safety without the need for an additional layer of insulation.
Therefore, the correct answer is option (a) Reinforced insulation.
