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Q 1657145084.     From a point P(\lambda, \lambda, \lambda), perpendicular PQ and PR are drawn respectively on the lines y = x, z =1 and y = -x, z= -1. If P is such that \angleQPR is a right angle, then the possible value(s) of \lambda is(are)

JEE 2014 ADVANCED Paper - 1
A

\sqrt{2}

B

1

C

-1

D

- \sqrt{2}

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