Q. What will be the output of the following R code?
> x <- list(a = 1:4, b = rnorm(10), c = rnorm(20, 1), d = rnorm(100, 5))
> lapply(x, mean)

• (A) $a [1] 2.5 $b [1] 1.248845 $c [1] 1.9935285 Loop Functions 90 $d [1] 5.051388
• (B) $a [1] 2.5 $b [1] 0.248845 $c [1] 0.9935285 Loop Functions 90 $d [1] 5.051388
• (C) $a [1] 3.5 $b [1] 0.248845 $c [1] 0.9935285 Loop Functions 90 $d [1] 5.051388
• (D) Error