## Core Concept
The Accredited Social Health Activist (ASHA) workers, often referred to in the context of initiatives like the United States Health Authority (USHA) but more commonly known as ASHA workers in India, play a critical role in bridging the gap between rural populations and healthcare services. The core concept here revolves around the structure and implementation of community health worker programs aimed at improving healthcare accessibility and outcomes.

## Why the Correct Answer is Right
The correct answer, **30,000**, reflects the proposed population coverage for which a USHA/ASHA worker is intended to serve. Typically, one ASHA worker is meant to cover a population of about 1,000 to 2,500 in rural or underserved areas, but the figure of 30,000 seems unusually high and might relate to a specific administrative or planning level rather than the direct service level. However, considering standard practices, ASHA workers are generally allocated to cover 1,000 families or approximately 2,500 populations in hilly, tribal, or difficult areas and 1,000 families or 5,000 populations in plain areas. The figure might be aiming towards a higher administrative level planning.

## Why Each Wrong Option is Incorrect
- **Option A:** Without a specific number provided, it's hard to assess its accuracy directly, but typically, ASHA workers serve much smaller populations.
- **Option B:** Similarly, without a specific number, direct assessment is challenging. However, the standard is around 1,000 to 2,500 families or 5,000 to 2,500 populations depending on the terrain.
- **Option D:** Again, lacking a specific figure, but generally, ASHA workers are tasked with much smaller and more direct population coverage.

## Clinical Pearl / High-Yield Fact
A crucial point to remember is that ASHA workers are community health workers instituted by the government of India's Ministry of Health and Family Welfare (MoHFW) as a part of the National Rural Health Mission (NRHM). They act as an interface between the community and the public health system, promoting health care and facilitating access to health services.

## Correct Answer: C. 30,000.