This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pediatrics
Simple febrile seizure is defined as 
Select and explain. 
A. Focal seizure, B. Seizure lasts < 30 min, C. Seizure within 24 hours of fever onset, D. All of the above
C: Seizure within 24 hours of fever onset
Answer: C: Seizure within 24 hours of fever onset 
Explanation: Simple / typical Febrile seizures

Single episode of generalised seizures
It lasts < 15 min
Seizure within 24 hours of fever onset
No recurrence within 24 hours period.