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If pqr = 1 , rst = 0 , and spr = 0, which of the following must be zero? A. P B. Q C. R D. S E. T

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pqr=1 \Rightarrow p\neq0,q\neq0,r\neq0 \\ rst=0\\ spr=0\\ $ As $ p\neq0,r\neq0 $ So S=0

 

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Ravindra Pindel

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