Number of pants is 4,
Number of shirts is 3 and,
Number of pair of shoes is 5.
Since it has to do with selection, we use combination to
To select a pair of pants out of 4 pairs is,
To select a shirt out of 3 is,
To select a pair of shoes from 5 pairs is,
Number of possible outcomes for creating an outfit is,
The number of possible outocmes to create an outfit is 60.
Hence, the correction option is B.