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
Impoant indicator for socioeconomic health 
Select and explain. 
A. Maternal moality rate, B. Perinatal moality rate, C. Under 5 moality rate, D. Infant moality rate
D: Infant moality rate
Answer: D: Infant moality rate 
Explanation: Ref:Park's Textbook of Preventive and Social Medicine 25th Ed