[shashi20008]

Unless you can reach a bank, or postoffice in India, it would be difficult to exchange your cash at full value. If you have a debit card with you, you can simply withdraw from ATM upon your arrival in India. In this case you can forget your cash for now, you can exchange it once you are in India. You can do so after Dec 31st too. If you do not have a debit card with you, I guess you could call a friend to pick you up at Airport. You could also try your luck with a local Currency Exchanger where ever you are, and ask for a change into 100 rupee notes. It will be costly, but it might work.