This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: obstetrics,pediatrics and geriatrics, Subject name: Social & Preventive Medicine
Neonatal period is- 
Select and explain. 
A. Upto 1 year of life, B. Upto 28 days of life, C. 28 days to 1 year, D. First 7 days of life
B: Upto 28 days of life
Answer: B: Upto 28 days of life 
Explanation: Neonatal period is from bih to 28 completed days of life.REF.PARK'S TEXTBOOK OF PREVENTIVE AND SOCIAL MEDICINE.Editon-21.Page no.-521