My congratulations too Sunil. I also have 100% featured, and it is a nice feeling - both for the traffic it may bring to the hubs, and also for the public acknowledgement by HubPages which it implies.
When 'featured hubs' first appeared, many quality articles by hubbers were unfeatured simply because the specialist subject matter meant that traffic was low. That has changed because to their credit, HubPages staff seem to recognise that quality rather than traffic levels should be the all important criterion if the prestige of Hubpages and individual HubPage writers is to grow.
That is why your hubs are all featured Sunil - because they are well written, quality articles. What's more, many of them feature detailed information about your part of the world, which it would be hard to find in such depth on other English language web pages. They are becoming a useful source of knowledge for anyone wishing to learn more about Indian culture, history or geography, and that makes them a great asset to HubPages.
Best wishes, Alun