MCQMediumJEE Main 2024 · 31 January, Shift 1Equation of Line in 3D

Mathematics Question from JEE Main 2024 · 31 January, Shift 1

Let Q and R be the feet of perpendiculars from the point P(a,a,aa, a, a) on the lines x=y,z=1x = y, z = 1 and x=y,z=1x = -y, z = -1 respectively. If QPR\angle QPR is a right angle, then 12a212a^2 is equal to:

  • A

    1212

  • B

    1818

  • C

    2424

  • D

    3030

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