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|(a+1, a+2, a+p), (a+2, a+3, a+q) ,(a+3,...

`|(a+1, a+2, a+p), (a+2, a+3, a+q) ,(a+3, a+4, a+r)|=0` , then p, q r are in
(A) `A P`
(B) `G P`
(C) `H P`
(D) none of these

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