**Core Concept**
The National Population Policy 2000 is a strategic framework aimed at addressing the population growth and fertility issues in India. The policy has set various objectives, including reducing the total fertility rate (TFR) to replacement level. Replacement level fertility is the rate at which a couple has just enough children to replace themselves and their partner, which is approximately 2.1 children per woman.

**Why the Correct Answer is Right**
The medium-term objective of the National Population Policy 2000 is to achieve a TFR of 2.1 by the year 2010. This is a crucial target as it would help in stabilizing the population growth rate and reducing the pressure on resources. The policy aims to achieve this through a range of strategies, including improving access to family planning services, increasing awareness about family planning, and promoting the use of modern contraceptive methods.

**Why Each Wrong Option is Incorrect**
**Option A:** 2015 - This is incorrect as the medium-term objective of the National Population Policy 2000 is to achieve a TFR of 2.1 by 2010, not 2015.
**Option B:** 2020 - This is incorrect as the medium-term objective of the National Population Policy 2000 is to achieve a TFR of 2.1 by 2010, not 2020.
**Option C:** 2025 - This is incorrect as the medium-term objective of the National Population Policy 2000 is to achieve a TFR of 2.1 by 2010, not 2025.

**Clinical Pearl / High-Yield Fact**
It's essential to remember that the National Population Policy 2000 has set a specific target of reducing the TFR to replacement level by 2010. This is crucial for understanding the policy's objectives and strategies for population growth control.

**Correct Answer:** C. 2010