CBSE 2026 · Region 3 · Set 3 · Q3 · 1 mark
Direction ratios of lines $\displaystyle l_{1}$ and $\displaystyle l_{2}$ respectively are $\displaystyle <1,0,0>$ and $\displaystyle <0,-1,0>$. The direction ratios of the line perpendicular to both $\displaystyle l_{1}$ and $\displaystyle l_{2}$ are :
Official answer
From CBSE’s own marking scheme for this paper.
(B)
$\displaystyle <0, 0, -1>$
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CBSE Class 12 Mathematics past-paper question from the 2026board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.