Which of the following sort a dataframe by the order of the elements in B?(a) x[rev(order(x$B)),](b) x[ordersort(x$B),](c) x[order(x$B),](d) x[rev(x$B),]

Which of the following sort a dataframe by the order of the elements i

1.	Which of the following sort a dataframe by the order of the elements in B?(a) x[rev(order(x$B)),](b) x[ordersort(x$B),](c) x[order(x$B),](d) x[rev(x$B),]
Answer» Correct option is (a) x[rev(order(x$B)),] To elaborate: x[rev(order(x$B)),] sort the dataframe in reverse order.

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Which of the following sort a dataframe by the order of the elements in B?(a) x[rev(order(x$B)),](b) x[ordersort(x$B),](c) x[order(x$B),](d) x[rev(x$B),]

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