at 50k, you have a decent budget. regarding your web link, i recommend visiting a computer hardwre store rather than online, as there is some confusion about whether warrnty cover the online purchases. but if you insist, i'd recommend amazon.in or flipkart.com
Here is a build suggestion:
07,000 Processor - I3 Haswell from intel
04,000 Motherboard - B85 from Asrock or Gigabyte
03,000 RAM - Corsair Valueselect 4 GB 1600 MHz
10,000 Graphics Card - NVIDIA GTX 750 Ti (non overclocked) from ASUS or Zotac
09,000 21.5" monitor from Dell or Benq or Asus
04,000 HDD - Seagate 7200 RPM 3'5" 1 TB hard drive
01,000 ODD - Any DVD r/w drive
04,000 Case - CM N300 ATX cabinet
03,000 SMPS - Corsair CX series 430 W SMPS
03,000 Keyboard, Mouse Webcam...