The correct option is B less than
The product of two proper fractions is less than both the fractions.
Consider 23×45=815, where 23=1015 and 45=1215.
(To compare fractions, we must conver the fractions to like fractions.)
Note that the product 815 is less than both 1015 and 1215.
Thus, 815 is less than both 23 and 45.
In other words, the product of two proper fractions is always less than both the fractions.