The Government of India has officially declared which one of the following rivers as a National River in order to highlight its special importance and promote conservation?

Introduction / Context:
Rivers play a vital role in India's ecology, economy and culture. Among them, some rivers have special status due to their religious, historical and environmental significance. The Government of India has declared one major river as a National River to emphasise its importance and focus attention on its cleaning and conservation. This question tests whether you can correctly identify that river from among other important Indian rivers.

Given Data / Assumptions:

- The question refers to the official declaration of a National River.- Several major rivers of India are provided as options.- We assume awareness of national level initiatives for river conservation.

Concept / Approach:
The Ganga, also called the Ganges, is widely regarded as India's most sacred river and is crucial for the livelihoods of millions of people along its course. Recognising its cultural and ecological importance, the Government of India declared the Ganga as the National River and created institutions such as the National Ganga River Basin Authority to oversee its conservation. While rivers like Yamuna, Kaveri and Godavari are also very important, none of them has been officially designated as the National River of India. Therefore, Ganga is the correct answer.

Step-by-Step Solution:
1. Recall that the title National River is meant to highlight a river of exceptional significance for the country.2. Recognise that the Ganga is widely considered the holiest river in Hindu tradition and is central to religious and cultural life in northern India.3. Remember that the Government of India announced special missions, including the National Ganga River Basin Authority and later Namami Gange, specifically linked to the Ganga.4. Compare the options: Yamuna, Kaveri and Godavari are major rivers but have not been given the official title of National River.5. Conclude that Ganga is the river that has been declared the National River and select it as the correct answer.

Verification / Alternative check:
Government press releases, environment ministry documents and standard general knowledge books state clearly that the Ganga was declared the National River of India to underline its importance and to coordinate efforts for its cleaning and rejuvenation. These sources do not assign this title to any other river, confirming that option Ganga is correct and that None of these is not appropriate here.

Why Other Options Are Wrong:
- Yamuna: a major tributary of the Ganga and extremely important, but it has not been declared the National River.- Kaveri: a vital river for southern India, yet it does not carry the official National River status.- Godavari: one of the longest rivers in India, sometimes called Dakshin Ganga, but not officially designated as National River.- None of these: incorrect because the Ganga has indeed been declared the National River.

Common Pitfalls:
Some candidates may be tempted to choose None of these if they are unsure of the official status or if they confuse state level river conservation programmes with national level declarations. Others may think of Godavari as Dakshin Ganga and wrongly assume it must be the National River. To avoid such errors, remember the simple fact that Ganga is the National River of India and is the primary focus of major national cleaning and conservation projects. Keeping this in mind will help you confidently answer similar questions in the exam.

Final Answer:
The Ganga has been declared the National River of India.