NIMCET 2021 Question Paper with solutions

Read the information given below and answer the following question:
I. In a family of six persons $\mathit{A},\mathit{B},\mathit{C},\mathit{D},\mathit{E}$ and $\mathit{F}$, there are two married couples.
II. $\mathit{D}$ is grandmother of $\mathit{A}$ and mother of $\mathit{B}$.
III. $\mathit{C}$ is wife of $\mathit{B}$ and mother of $\mathit{F}$.
IV. $\mathit{F}$ is the granddaughter of $\mathit{E}$.
What is $\mathit{C}$ to $\mathit{A}$