JEE Main 201911 Jan, Morning shiftMathematicsEasyMatrices and Determinants245× since 2002Let A = (02qrpq−rp−qr).\left( {\matrix{ 0 & {2q} & r \cr p & q & { - r} \cr p & { - q} & r \cr } } \right).0pp2qq−qr−rr. If AA^T = I₃, then ∣p∣\left| p \right|∣p∣ is :AOption A. 12{1 \over {\sqrt 2 }}21BOption B. 15{1 \over {\sqrt 5 }}51COption C. 16{1 \over {\sqrt 6 }}61DOption D. 13{1 \over {\sqrt 3 }}31CheckSkip · show solution
