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P(1,2,-2) ,Q(8,10,11) ,R(1,2,3) ,S(3,5,7...

P(1,2,-2) ,Q(8,10,11) ,R(1,2,3) ,S(3,5,7) if` lambda` denotes the length of projection of PQ on RS then `29 lambda^(2)+29`
(A) 8100 (B) 8029 (C) 8129 (D) 90

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