The field separator in cut command is specified with

Answer: Option B

In Unix, the cut command is used to extract sections from each line of input. The field separator, which specifies how the fields are separated in the input, is specified using the -d option followed by the delimiter character. For example, if you want to use a comma as the field separator, you would use cut -d','.
So, -d option is used to specify the field separator in the cut command.