Let A = (aᵢⱼ) be an n-rowed square matrix and I₁₂ be the matrix obtained by…

GATE · 1997 · CS · Question 4 subparts

Let A = (aᵢⱼ) be an n-rowed square matrix and I₁₂ be the matrix obtained by interchanging the first and second rows of the n-rowed identity matrix. Then A I₁₂ is such that its first

  1. A.

    row is the same as its second row

  2. B.

    row is the same as the second row of A

  3. C.

    column is the same as the second column of A

  4. D.

    row is all zero

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Correct answer: C

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