The maxwell's equation which interprets that isolated magnetic poles do not exist is

A. $$\nabla .\overrightarrow E = \frac{P}{{{\varepsilon _0}}}$$

B. $$\nabla .\overrightarrow B = 0$$

C. $$\nabla \times \overrightarrow E = - \frac{{\partial \overrightarrow B }}{{\partial t}}$$

D. $$\nabla \times \overrightarrow B = {\mu _0}l + \mu {\varepsilon _0} - \frac{{\partial \overrightarrow E }}{{\partial t}}$$

Answer: Option B