MAT Exam 2025 Paper

Concept:Blood relation problems require knowing the gender of each person to decide between brother and sister.Explanation:$\mathrm{B}$ is the father of $\mathrm{K}$, so $\mathrm{K}$ is a child of $\mathrm{B}$.$\mathrm{R}$ is the son of $\mathrm{B}$, so $\mathrm{R}$ is male.Thus, $\mathrm{K}$ and $\mathrm{R}$ are siblings because both are children of $\mathrm{B}$.However, the gender of $\mathrm{K}$ is not stated in the question.If $\mathrm{K}$ is male, then $\mathrm{K}$ is the brother of $\mathrm{R}$, shown as $\mathrm{K}+\mathrm{R}$.If $\mathrm{K}$ is female, then $\mathrm{K}$ is the sister of $\mathrm{R}$, shown as $\mathrm{K}\div\mathrm{R}$.Since both possibilities exist, no single relation from the given options can be confirmed.Answer:D. Cannot be determined