TASK DEFINITION: You will be given a trivia clue, and the category it belongs to. You should answer with the best answer that belongs in the category and is described by the clue. For simplicity, answers should be in all lower cased letters.
PROBLEM: Category: NEXT LETTER AFTER... 
Clue: ...J in the Macedonian alphabet

SOLUTION: k

PROBLEM: Category: CANTANTES 
Clue: Last name of Enrique who's following in his father Julio's footsteps...er vocal cords

SOLUTION: iglesias

PROBLEM: Category: A DELICATE OPERATION 
Clue: A bypass operation may bypass the carotid or coronary one of these

SOLUTION:
artery