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: ANNIVERSARY GIFTS 
Clue: In one form or another you can fork over this metal on the 5th or 25th anniversary

SOLUTION: silver

PROBLEM: Category: ZOOLOGY 
Clue: Unlike the octopus or squid, the nautilus may have up to 90 of these armlike appendages

SOLUTION: tentacles

PROBLEM: Category: YOURS FOR AN "ONG" 
Clue: A multitude of people crowded together

SOLUTION:
a throng