Sound — practice question

Which two frequencies lie outside the audible range for a healthy human ear?

• A$2.0\,\text{Hz}$ and $500\,\text{Hz}$
• B$2.0\,\text{Hz}$ and $25\,\text{kHz}$
• C$25\,\text{Hz}$ and $25\,\text{kHz}$
• D$500\,\text{Hz}$ and $25\,\text{kHz}$