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If a,b,c are positive and are the pth, qth and rth terms respectively of as G.P., the the value of `|(loga, p, 1),(logb, q, 1),(logc, r, 1)=` (A) 1 (B) `pqr(loga+logb+logc)` (C) 0 (D) `a^pb^qc^r`
A. 1
B. 0
C. `-1`
D. none of these

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