Which one of the following Maxwell's equations gives the basic idea of radiation?

A. \[\left. \begin{gathered} \nabla \times H = \frac{{\partial D}}{{\partial t}} \hfill \\ \nabla \times E = \frac{{ - \partial B}}{{\partial t}} \hfill \\ \end{gathered} \right\}\]

B. \[\left. \begin{gathered} \nabla \times E = \frac{{ - \partial B}}{{\partial t}} \hfill \\ \nabla \cdot D = 0 \hfill \\ \end{gathered} \right\}\]

C. \[\left. \begin{gathered} \nabla \cdot D = \rho \hfill \\ \nabla \cdot B = 0 \hfill \\ \end{gathered} \right\}\]

D. \[\left. \begin{gathered} \nabla .B = 0 \hfill \\ \nabla \times H = \frac{{\partial D}}{{\partial t}} \hfill \\ \end{gathered} \right\}\]

Answer: Option A