**Core Concept**
The National Population Policy 2000 is a comprehensive framework aimed at achieving a balance between population growth and development in India. The policy's primary goal is to reduce the Total Fertility Rate (TFR) to a replacement level of 2.1, which is the average number of children a woman would have in her lifetime to maintain a stable population.

**Why the Correct Answer is Right**
The policy aims to achieve a TFR of 2.1 by promoting family planning, improving healthcare, and enhancing education, particularly for women. This is necessary to reduce the high population growth rate in India, which was approximately 1.9% at the time the policy was implemented. By achieving a TFR of 2.1, the policy aims to reduce the population growth rate to a sustainable level, thereby alleviating pressure on resources and improving the overall quality of life.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because the National Population Policy 2000 does not specify a target date for achieving a TFR of 2.1.
**Option B:** This option is incorrect because the policy does not aim to achieve a TFR of 3.1, which would actually lead to population growth.
**Option C:** This option is incorrect because the policy's target date for achieving a TFR of 2.1 is not specified as 2020.

**Clinical Pearl / High-Yield Fact**
It's essential to note that the National Population Policy 2000 is a long-term plan, and its objectives are to be achieved through a combination of family planning, healthcare, and education initiatives. The policy's success will depend on the effective implementation of these measures and the participation of various stakeholders, including government agencies, NGOs, and the general public.

**Correct Answer: C. 2050**