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For A = [[1, 2], [3, 4]] and B = [[0, 1], [1, 0]], the product AB is:
A[[3, 4], [1, 2]]
B[[0, 4], [3, 0]]
C[[2, 1], [4, 3]]
D[[1, 2], [3, 4]]
Answer & Solution
Correct answer: C. [[2, 1], [4, 3]]
Right-multiplying by this matrix swaps the columns of A, giving [[2, 1], [4, 3]].
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