Which one of the following is NOT a basic property of electric charge?

The basic properties of electric charge include: (1) Additivity—charges add up algebraically, (2) Conservation—the total charge of an isolated system remains constant, and (3) Quantization—charge exists in discrete units that are integral multiples of the electronic charge (e = 1.6 × 10⁻¹⁹ C). Charges cannot be created or destroyed in an isolated system; they can only be transferred from one body to another. This is the principle of conservation of charge, so option (d) is NOT a property.