This seems to be the best lapptop under your budget. I'm not sure about the Kolkata pricing though.
Lenovo 3000 G430a (59-016387/59-016388)
· Intel® Pentium® Dual-Core Processor T3200
(2.0GHz, 667MHz FSB, 1MB L2 Cache)
- Integrated Lenovo 802.11 b/g Wireless
· Genuine Windows Vista® Home Basic
(English/Traditional Chinese)
· Mobile Intel® PM45 Express Chipset
· 1 x 1GB DDR2 RAM (667MHz)
· 160GB HDD (5400rpm)
· Dual Layer Multi-Burner DVDRW Drive
· 14.1" WXGA Ultra Clear TFT
· nVidia GeForce 9300M GS 256MB Discrete
· 10/100 Ethernet, 56K Modem
· Bluetooth
· 4-in-1 Card Reader
· 6 Cell Lithium-Ion
· 1 year parts and labour warranty
(system battery: 1 year)
I guess you get a portable or something else free with it.
Rs.34000-/- .............. + 1gb more(900).