Electromagnetic spectrum — practice question

Which frequency of electromagnetic radiation might be ultraviolet?

• A$1.0 \times 10^{6}\,\text{Hz}$
• B$1.0 \times 10^{9}\,\text{Hz}$
• C$1.0 \times 10^{12}\,\text{Hz}$
• D$1.0 \times 10^{15}\,\text{Hz}$