Ashok Kumar Behuria replies: There is an overlap between the two. However, they are different. Indian subcontinent is a subset of South Asia, as much as both are subsets of the Asian continent.

As a geographical expression, Indian subcontinent encompassed the British colonial administrative unit called India, which comprised of the present day states of India, Pakistan and Bangladesh. Till 1936, Burma (now Myanmar) was also part of British India, but was not considered part of the subcontinent.

Ashok Kumar Behuria replies: The prime challenge for SAARC and South Asia is how to engender effective economic and security cooperation to boost regional prosperity and development.

Ashok Kumar Behuria replies: This question wrongly preconceives that India was on an adventure, on the diplomatic front, in the neighbourhood, and it has backfired. In reality, this is not the way one should look at diplomacy or foreign policy practices of a state. In the post-Cold War period, the regional geo-political reality has changed massively. India's policy preferences have changed too, to address a whole new set of challenges that have popped up on the horizon, while some of the old challenges have become even more complex and complicated.

Ashok Kumar Behuria replies: South Asia is an ethnic and national boiling pot. Most states in South Asia are multi-ethnic and multi-national in character. There are numerous ethno-national identities demanding their rightful place in the region in terms of recognition of their separateness, due representation in the political and economic affairs and autonomy in managing land and security in the areas they live in, both within the state systems (autonomist) and outside them (secessionist/separatist).

Abhijit Singh replies: To begin, it is important to point out that a satellite navigational system is an onerous enterprise that takes enormous capital and technological investment - not to mention years of research and experimentation - to fully operationalise. The high investment needed is one reason why countries favour developing navigation systems on a shared basis, so that the labour and costs involved can be distributed among the various partner.