Greetings for the day!!
Regarding Option #4 of your post, as you are Tamilnadu based why don't you move with SRM University which is Chennai based with good reputation. And other available options are Sikkim Manipal University(SMU) & Punjab Technocal University(PTU).
Regarding Option #3 you can go for Microsoft Certified Courses, SAP Certification, Sun Certification & Oracle Certification Courses etc.
Regarding Option #1 & 2 unable to provide any opinion
Amit J P Pandey
Right Angle Solution
31st May 2012 From India, Bangalore