Correct Answer: A short nap

Solution : The third option is correct.

Explanation:
The idiom "forty winks" means a short nap or a brief sleep, usually during the day. It implies a quick and light snooze rather than a deep and prolonged sleep. The term "forty winks" suggests a short duration, and it is often used humorously or colloquially to describe a brief period of rest or sleep to refresh oneself.

Therefore, the correct answer is a short nap .