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Mathematics · 2026 · 1 mark
CBSE 2026 · Region 3 · Set 2 · Q15
If a matrix B is such that B [1, 2, 3] = [1, 2, 3; 0, 1, 1; 2, 0, 1], then the order of matrix B is: matrix B is:
If a matrix $\displaystyle B$ is such that $\displaystyle B\left[\begin{array}{lll}1 & 2 & 3\end{array}\right]=\left[\begin{array}{lll}1 & 2 & 3 \\ 0 & 1 & 1 \\ 2 & 0 & 1\end{array}\right]$, then the order of matrix $\displaystyle B$ is : matrix B is :
Official answer
(B)
$\displaystyle 3 × 1$
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CBSE Class 12 Mathematics past-paper question from the 2026 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.