What will be the output of the following R code?
> m <- matrix(1:4, nrow = 2, ncol = 2)
> dimnames(m) <- list(c("a", "b"), c("c", "d"))
> m
> m <- matrix(1:4, nrow = 2, ncol = 2)
> dimnames(m) <- list(c("a", "b"), c("c", "d"))
> mA. c d
a 1 3
b 2 4
B. c d
a 1 2
b 2 3
C. c d
a 1 3
b 4 2
D. Error
Answer: Option A
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