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: SUPREMES 
Clue: He was supreme commander of Allied forces in Europe, & later of NATO forces

SOLUTION: dwight d. eisenhower

PROBLEM: Category: ANIMALS 
Clue: These mollusks, not oysters, are the most common source for freshwater pearls

SOLUTION: mussels

PROBLEM: Category: NOTABLE NAMES 
Clue: It might ring a bell that this Russian came up with the concept of the conditioned reflex

SOLUTION:
ivan pavlov