140 in Roman numerals is ____.

The correct option is B CXL

$\begin{array}{cccccccc}\text{Roman}& \text{I}& \text{V}& \text{X}& \text{L}& \text{C}& \text{D}& \text{M}\\ \text{Hindu-Arabic}& 1& 5& 10& 50& 100& 500& 1000\end{array}$

When a Roman numeral with the larger value is on the left, we add the values together and when it is on the right, we subtract the values.

140 = 100 + 40
But, 100 = C,
40 = 50 -10 = XL.

140 = 100 + 40 = CXL