CBSE Class 12 Mathematics 2026 Supplementary Paper 65(B)/7 · Q131 Marksprojections CBSE Class 12 Mathematics 2026 Supplementary Paper 65(B)/7 · Question 13 (Vector Algebra) Find the scalar projection of (2,−1,1) on (1,−2,1). (A) 3/√6(B) −5/√6(C) 2/√6(D) 5/√6