Question

sleep - wake disorder characterized by sudden unexplained \sleep attacks\ during the day
dysphagia
epilepsy
insomnia
narcolepsy
hypotension

Explanation:

• Dysphagia: Refers to difficulty in swallowing, not related to sleep - wake disorders with sudden sleep attacks.
• Epilepsy: Is a neurological disorder characterized by seizures, not sudden "sleep attacks" during the day.
• Insomnia: Is a disorder where a person has trouble falling or staying asleep, not sudden daytime sleep attacks.
• Narcolepsy: Is a sleep - wake disorder that is characterized by sudden, unexpected "sleep attacks" during the day.
• Hypotension: Refers to low blood pressure, not related to the described sleep - wake disorder symptoms.

Answer:

narcolepsy