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Let `A=[a_(ij)]_(mxxn)` be a matrix such that `a_(ij)=1` for all I,j. Then ,

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Let `A=[a_(ij)]_(mxxn)` be a matrix such that `a_(ij)=1` for all I,j. Then ,
A. rank (A) gt 1
B. rank (A) = 1
C. rank (A) = m
D. rank (A) = n
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Correct Answer - B
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