Answer the following question given this paragraph: 

± symbols are the values for antiquarks. B is baryon number, S is strangeness, c is charm, b is bottomness, t is topness. Values are approximate, are not directly observable, and vary with model.


Q: Strangeness, charm, bottomness, and topness are properties of what subatomic particle?

 Choices:

- pion

- dark matter

- molecules

- quarks

A:
quarks
