Fact 1: Centrioles are organelles involved in cell division.

Fact 2: Centrioles come in pairs.

Given the two facts above, answer the question "Organelles involved in cell division come in what groups?" with the following options: 
- plants
 - Groups of five
 - Pairs
 - complex
 - Groups of four
 - Groups of three
 - rings
 - three


 

   Pairs      