The actual prices of the 5 items are $\(\$ 257, \$ 450, \$ 550, \$ 850 \& \$ 1020\)$, whose standard deviation is to be compared with the standard deviation of the reported price which will comes by changing two of the actual prices, increasing one by $\(\$ 120 \&\)$ decreasing another one by $\(\$ 120\)$ and keeping the remaining 3 same.

It is not given that which two prices out of the five prices are to be changed. Increasing or decreasing those prices which can cause more deviation from the mean would result in increase in the standard deviation whereas increase/decrease in the values close to the mean would result in decrease in the standard deviation.



Hence a unique comparison cannot be formed between column A \& column B quantities, so the answer is (D).