MCQ
If the straight lines $\vec r=$$(1,2,3)+k(\lambda ,2,3),k \in R$ and $\vec r=$$(2,3,1) +k(3,\lambda ,2),k \in R$ intersect at a point , then the interger $\;\lambda $ is equal to .
- ✓$-5$
- B$5$
- C$2$
- D$-2$
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