Which chronotype stays up later and finds it harder to wake up early?

• A. Early chronotype
• B. Intermediate chronotype
• C. Night owl
• D. Late chronotype

Answer: (D)

Chronotypes describe individual timing preferences for sleep and wakefulness along a spectrum from early to late. A late chronotype tends to prefer going to bed late and waking up late, and often finds it harder to wake up early because their internal clock is set later. This pattern is commonly called a night owl, reflecting a delayed circadian phase and later melatonin onset. In contrast, an early chronotype goes to bed and wakes early, and an intermediate chronotype falls somewhere in between. So the description of someone who stays up later and struggles to rise early fits the late chronotype.