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: Gynaecology & Obstetrics
Most common cause of post neonatal mortality is: 
Select and explain. 
A. Genetic cause, B. Maternal health during pregnancy, C. Environmental causes, D. Conditions effecting in early neonatal period
C: Environmental causes
Answer: C: Environmental causes 
Explanation: Deaths occurring from 28 days of life to under one year are called postneonatal death.