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Match the LIST-I with LIST-II

LIST-I (Line)LIST-II (Direction cosiness)
A. r⃗=(2i^−j^+k^)+λ(3i^+2k^)\vec{r} = (2\hat{i} - \hat{j} + \hat{k}) + \lambda(3\hat{i} + 2\hat{k})I. ⟨25,15,0⟩\left\langle \dfrac{2}{\sqrt{5}}, \dfrac{1}{\sqrt{5}}, 0 \right\rangle
B. x−12=3−y1=2z−14\dfrac{x-1}{2} = \dfrac{3-y}{1} = \dfrac{2z-1}{4}II. ⟨−13,23,−23⟩\left\langle -\dfrac{1}{3}, \dfrac{2}{3}, -\dfrac{2}{3} \right\rangle
C. x+11=2y+11,z=−1\dfrac{x+1}{1} = \dfrac{2y+1}{1}, z = -1III. ⟨313,0,213⟩\left\langle \dfrac{3}{\sqrt{13}}, 0, \dfrac{2}{\sqrt{13}} \right\rangle
D. 1−x1=y2=1−z2\dfrac{1-x}{1} = \dfrac{y}{2} = \dfrac{1-z}{2}IV. ⟨23,−13,23⟩\left\langle \dfrac{2}{3}, -\dfrac{1}{3}, \dfrac{2}{3} \right\rangle

Choose the correct answer from the options given below:

Solution

✅ Correct Option: 2

A: direction (3,0,2)(3,0,2), length 13\sqrt{13}, giving III.

B: rewriting, direction (2,−1,2)(2,-1,2), length 33, giving IV.

C: direction (1,12,0)∝(2,1,0)(1,\tfrac12,0) \propto (2,1,0), length 5\sqrt5, giving I.

D: direction (−1,2,−2)(-1,2,-2), length 33, giving II.

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