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: Unknown
The following is the 4th Millennium Development Goal: 
Select and explain. 
A. To reduce maternal mortality rate, B. Combat HIV/AIDS, C. Environmental sustainability, D. To reduce infant mortality rate
D: To reduce infant mortality rate
Answer: D: To reduce infant mortality rate 
Explanation: Millennium development goals

Baseline year for MDG – 1990
Deadline year for MDG – 2015
In total there are 8 goals, 21 quantifiable targets and 60 indicators. Out of these, 3 goals, 8 targets and 18 indicators are directly related to health.

Goals of MDG