What is the difference between the TYPE and LIKE statements in data declaration?

a) LIKE is used to define variables that are similar to the ones previously defined whereas TYPE is used to define variables that exist in data dictionary
b) LIKE is used to define variables that are similar to the ones previously defined whereas TYPE is used to define variables to refer ABAP internal data elements.
c) LIKE is used to define variables that exist in data dictionary whereas TYPE is used to define variables to refer ABAP internal data elements.
d) Both of them can be used interchangeably, there is no difference.