What is the name of the tidal estuary located on the border between India and Pakistan along the Arabian Sea coast?

Introduction / Context:
This question is about the political and physical geography of the western coast of India, particularly the border with Pakistan. The coastal boundary in the Kachchh region includes tidal creeks and estuaries, one of which has become well known due to boundary discussions and maritime claims. Knowing the correct name of this creek or estuary is useful for both map based questions and current affairs.

Given Data / Assumptions:

• The question asks for the name of the estuary on the border of India and Pakistan.
• The options are Daman Creek, Karwar Creek, Sir Creek, Mandovi Creek, and Kori Creek.
• We assume familiarity with the Kachchh region of Gujarat and the adjoining Sindh coast in Pakistan.
• Standard geography and current affairs references often discuss one specific creek in this area by name.

Concept / Approach:
Sir Creek is a tidal estuary in the marshy Rann of Kachchh region, forming part of the boundary between India and Pakistan. It has been the subject of discussions on the precise demarcation of the maritime boundary and associated exclusive economic zones. While Kori Creek is a nearby feature and other creeks exist along the coast, Sir Creek is the one most widely mentioned in exam oriented material as forming the disputed boundary area. The other options refer to creeks or rivers in different parts of the Indian coastline and do not serve as the main border feature with Pakistan.

Step-by-Step Solution:
Step 1: Recall that the coastal boundary between India and Pakistan in the Kachchh region passes through tidal creeks and marshy land. Step 2: Remember that Sir Creek is the specific name commonly associated with the India Pakistan maritime boundary dispute. Step 3: Note that Daman Creek is located near Daman on the Gujarat coast and Karwar and Mandovi are linked with coastal Karnataka and Goa respectively, far from the India Pakistan border. Step 4: Recognise that Kori Creek is another creek in the region but Sir Creek is the one explicitly named in many boundary discussions and exam questions. Step 5: Select Sir Creek as the correct answer.

Verification / Alternative check:
You can verify this by reviewing maps of the Rann of Kachchh and reading about the India Pakistan boundary. Many atlases and textbooks mark Sir Creek along the border and explain that it is a tidal estuary whose shifting course has contributed to boundary interpretation issues. Articles and reports about the maritime boundary between India and Pakistan repeatedly refer to the Sir Creek dispute, which confirms that Sir Creek is the creek on the international border.

Why Other Options Are Wrong:
Daman Creek lies near the union territory of Daman on the Arabian Sea coast and is not on the border with Pakistan. Karwar Creek is associated with the Karnataka coast around Karwar, while Mandovi Creek would relate to the Mandovi river in Goa, both far to the south. Kori Creek is indeed another creek in the Kachchh region near the border, but the creek that is specifically named in most border discussions and that is expected in exam questions is Sir Creek. Thus, only Sir Creek fits the exact wording and common usage.

Common Pitfalls:
A common mistake is to confuse Sir Creek with Kori Creek due to similar sounding names and proximity, especially if the learner has only a vague memory of the map. Another pitfall is to select a more familiar coastal name such as Mandovi simply because it is widely known as a tourist region. To avoid such errors, pay special attention when studying international boundaries and memorise specific named features like Sir Creek that appear frequently in questions related to India neighbours.

Final Answer:
Sir Creek