Prashanth , by your serial number, your "MAc" is a MacBook PRO
"2.4 GHz Core i5 (I5-2435M)
Intro Date: October 24, 2011 Disc Date: June 11, 2012
Order No: MD313LL/A Model No: A1278 (EMC 2555*)
Subfamily: Late 2011 13" Model ID: MacBookPro8,1
Std RAM: 4 GB Std VRAM: 384 MB
Std Storage: 500 GB (5400 RPM) Std Optical: 8X DL "SuperDrive"
apple part number for that is 661-6158 which is a 820-2936-A logic board. Hope this helps, good luck.