Which of the following scenarios does NOT involve the presence of any symptoms?

A. A 44-year-old male with abdominal pain and severe dizziness
B. A 61-year-old female who is unconscious with facial cyanosis
C. A 55-year-old male with a severe headache and 2 days of nausea
D. A 49-year-old female with blurred vision and ringing in the ears

Answer: B. A 61-year-old female who is unconscious with facial cyanosis