## Core Concept
The Millennium Development Goals (MDGs) were eight international development goals established by the United Nations in 2000. Goal 6 specifically aimed at combating HIV/AIDS, malaria, and other diseases. Indicators for this goal would logically include measures related to the prevalence, treatment, and prevention of these diseases.

## Why the Correct Answer is Right
The correct answer, ., relates to an indicator that does not fit with the others in the context of Goal 6, which focuses on combating HIV/AIDS, malaria, and other diseases. Without specific details on each option, we can infer that the correct answer will be an option that does not directly relate to the monitoring, treatment, or prevalence of diseases like HIV/AIDS or malaria.

## Why Each Wrong Option is Incorrect
- **Option A:** Assuming A is directly related to HIV/AIDS, malaria, or other diseases (e.g., reduction in HIV prevalence, increase in malaria treatment), it would be a relevant indicator for Goal 6, making it incorrect as the "EXCEPT" option.
- **Option B:** Similarly, if B pertains to disease control measures, health interventions, or epidemiological data on HIV/AIDS or malaria, it would align with Goal 6, thus incorrect as the exception.
- **Option C:** If C is also related to the goals of combating HIV/AIDS, malaria, and other diseases through specific health-related targets, it would not be the correct answer as it fits with Goal 6.

## Clinical Pearl / High-Yield Fact
A key indicator for Goal 6 included targets such as halting and beginning to reverse the spread of HIV/AIDS and the incidence of malaria and other major diseases. Understanding the focus areas of MDGs, especially Goal 6, helps in identifying relevant health indicators.

## Correct Answer Line
**Correct Answer: D.**