What is neonatal period–

Correct option is D

Sol. The neonatal period is defined as the first 28 days of life (0–28 days). This is a critical time for infant survival, as the risk of mortality is highest during this period due to infections, birth asphyxia, or prematurity.
Explanation of each option:
· (a) 0–7 days – This is called the early neonatal period, not the complete neonatal period.
· (b) 0–14 days – Not a standard classification; this range is not used in medical definitions.
· (c) 0–21 days – Also incorrect, as WHO standard is up to 28 days.
· (d) 0–28 days – Correct answer. This is the complete neonatal period, after which the infant enters the post-neonatal stage.