With which neighbouring country did India formally exchange revised border maps as part of a land boundary settlement agreement?

Introduction / Context:
India shares land borders with several countries and has had long standing boundary issues with some of them. One important development in recent years was the formal exchange of border maps as part of a Land Boundary Agreement that aimed to settle disputes over enclaves and adverse possessions. This question checks whether you can identify the specific neighbour with whom India carried out such an exchange of revised border maps, a key milestone in regional diplomacy and boundary management.

Given Data / Assumptions:
- Four neighbouring countries are listed: China, Sri Lanka, Pakistan and Bangladesh. - The question refers to a formal exchange of border maps as part of a land boundary settlement. - We assume the context of the high profile Land Boundary Agreement implemented in the last decade. - Exactly one of these countries is associated with that specific map exchange.

Concept / Approach:
India's Land Boundary Agreement with Bangladesh resolved a complex enclave problem where small pockets of territory belonging to one country lay deep inside the other. To implement the agreement, both countries had to redraw and exchange detailed border maps, so that land parcels could be legally transferred and residents could select their preferred citizenship. India's disputes with China and Pakistan involve different forms of boundary negotiations, often without comprehensive implemented land boundary exchange of this kind. Sri Lanka shares a maritime boundary with India and does not fit the typical land boundary map exchange context. Identifying the only neighbour with a widely publicised Land Boundary Agreement leads you to Bangladesh.

Step-by-Step Solution:
Step 1: Recall that India's most publicised Land Boundary Agreement in recent years was with Bangladesh. Step 2: Note that this agreement involved exchange of enclaves, redrawing of the land boundary and formal exchange of maps. Step 3: Consider India–China relations: although there are Line of Actual Control maps and discussions, a comprehensive settled land boundary with exchanged maps has not been fully implemented. Step 4: Consider India–Pakistan borders: there are disputes and agreements, but not a recent large scale land boundary map exchange similar to the one with Bangladesh. Step 5: Sri Lanka mainly shares maritime boundaries with India, so it is not the correct context for a land boundary map exchange. Step 6: Therefore, the correct answer is Bangladesh.

Verification / Alternative check:
If you remember news headlines about the settlement of enclaves in Cooch Behar and surrounding areas, they specifically referenced India and Bangladesh exchanging maps and implementing the Land Boundary Agreement. There were widely covered ceremonies showing officials from both sides exchanging documents and boundary charts. No other neighbour from the options was linked to such a major enclave settlement. This reinforces that Bangladesh must be the country referred to in the question.

Why Other Options Are Wrong:
China is wrong because India and China still have unresolved boundary disputes without a comprehensive land boundary settlement and map exchange of this type.

Sri Lanka is wrong because the main India–Sri Lanka boundary issues are maritime and not centred on a large land boundary map exchange involving enclaves.

Pakistan is wrong because although India and Pakistan share a significant land border, there was no recent Land Boundary Agreement involving large scale exchange of border maps and enclaves like with Bangladesh.

Common Pitfalls:
Some candidates confuse this Land Boundary Agreement with other boundary discussions, especially with China, due to frequent media coverage of Line of Actual Control issues. Others may think about maritime boundary settlements with Sri Lanka and mistakenly assume they involved similar map exchanges. To avoid such confusion, link the keyword "enclaves" and "Land Boundary Agreement" specifically with Bangladesh in your memory, as that combination is unique in India's neighbourhood diplomacy.

Final Answer:
India formally exchanged revised border maps as part of a land boundary settlement agreement with Bangladesh.