Hi Mandar,
its always good to get certified in which you have interest by your career point of view.
For sharepoint certification you need to decide first that you want to pursue for Application Development or Administration & support.
If you want to go for sharepoint Application Development then you can think of Exam 70-542 or Exam 70-573.
Otherwise you have interest in Administration & support of sharepoint then you can think of Exam 70-630 or Exam 70-667
I would like to suggest you to go for Sharepoint 2010 Exams because they are latest.
Please, visit
http://www.microsoft.com/learning/en/us/certification/cert-sharepoint-server.aspx#tab1 & http://www.microsoft.com/learning/en/us/certification/cert-sharepoint-server.aspx#tab2
I hope this may help you.
All the best for exams :)
Warm Regards,
Anant Patil.