Get any mobo based on the Geforce 6150 chipset. It's the best choice for an AMD platform. The Asus M2NPV-MX should cost about Rs. 4,700. Buy socket AM2 mobo's as the older socket 939 one's don't have much scope to upgrade.
Hmm nice suggestions.... but I am confused..tell me which processor AM2 and which AM2 Motherboard (budget --> cheap and best) will be future proof for two three years
Read the post above yours. He needs something cheap and C2D certainly isn't cheap.
@esumitkumar: Get an Athlon64 X2 3600+ (Rs. 6900) processor and an Asus M2NPV-MX mobo (Rs. 4700) based on Geforce 6150 chipset. If you want to save a little more money, get an Asus M2N-MX mobo (Rs. 4300) based on Geforce 6100 chipset.