We wish to have a new data structure for sets. charSet is a variable of type set of characters, containing e$.$g$.\text{'}$a$\text{'},\text{'}$b$\text{'},\text{'}$c$\text{'}\}.$ intSet is a variable of type set of int, containing e$.$g$.\{10,11,12\}.$ Which of the following is a correct definition in main$()?$

mylntSet intSet$(3)$; myCharSet charSet$(3)$;

mySet set$(3)$;

mySet intSet$(3)$; charSet$(3)$;

mySet