CRA or CDM or Pharmacovigilance

Hi,

I am Upamanyu Modak. I am studying M.S. in Clinical Research. My course will end on August, 2012. I am B.Pharm as well.

I am searching jobs equivalent to my academics and areas of interests. I want to draw your attention in some queries:

1. Among CRA, CDM and Pharmacovigilance which will be better for me?

2. I am a fresher. Which of the above options will be suitable for a fresher?

Please guide me to get the correct path of career.