2022 June Business Mathematics and Logical reasoning and Statistics

Six persons are seen together in a group. They are A,B,C, D, E and F, B is brother of $\mathit{D}$, but $\mathit{D}$ is not brother of $\mathit{B}$. $\mathit{F}$ is brother of $\mathit{B},\mathit{C}$ and $\mathit{A}$ are married together. $\mathit{F}$ is son of $\mathit{C}$ but $\mathit{C}$ is not mother of $\mathit{F}$. $\mathit{E}$ is brother of $\mathit{A}$. How is $\mathit{D}$ related to $\mathit{A}$ ?