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.

Category: FORBES' RICHEST PEOPLE 
Clue: Worth $53.5 billion, Carlos Slim, owner of Telmex, became the first person from this country to top the Forbes list
mexico

Category: ALL ABOUT ANIMALS 
Clue: A type of beetle & a species of seal are named for this large land herbivore
an elephant

Category: '70s TV DETECTIVES 
Clue: William Conrad as Cannon guested on this Buddy Ebsen series

barnaby jones