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
Neonatal period extends up to – 
Select and explain. 
A. 21 days of life, B. 30 days of life, C. 28 days of life, D. 35 days of life
C: 28 days of life
Answer: C: 28 days of life 
Explanation: Neonate (Newborn)

From birth to under four weeks of age (< 28 days), the infant is called neonate.
The neonatal period has been further subdivided into -


Early neonatal period  → the First week of life (< 7 days)
Late neonatal period → 7th to < 28th day

Term neonate (term baby)

Any neonate born between 37 and < 42 weeks (259 - 293 days) of pregnancy irrespective of the birth weight.

Preterm baby

Any neonate born before 37 weeks (<259 days) of pregnancy irrespective of the birth weight.

Post-term baby

Any neonate born at or after 42 weeks (294 days or more) of pregnancy irrespective of the birth weight.