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
Perinatal period is defined as - 
Select and explain. 
A. From 20 week of gestation to bih, B. From 28 week of gestation to bih, C. From 28 week of gestation to one week after bih, D. From bih to one month after bih
C: From 28 week of gestation to one week after bih
Answer: C: From 28 week of gestation to one week after bih 
Explanation: Perinatal period is defined as from 28 week of gestation to one week after bih. REF. PARK'S TEXTBOOK OF PREVENTIVE AND SOCIAL MEDICAL 21ST EDITION. PAGE NO - 519