Dear Vasanth, you haven't mentioned your highest qualification. But going by Biology, am guessing you are in your 12th. If that is correct and you want to do Cost Management course, you should opt for CMA which was previously called ICWA. This course is of 3 stages: CMA Foundation, CMA Intermediate and CMA Final.

• Ideally for CMA Foundation, even if you have passed 10th or equivalent course, you are eligible. However you should have completed 17 years of age. 
• For CMA Intermediate, you should have completed 10+2 and Foundation Course or Graduation course from any recognised Institution.
• For CMA Final, you should have completed CMA Intermediate.

So in your case, if you have completed your Graduation in any discipline except for Arts,  you are directly eligible for CMA Intermediate. But if you are in +2, you should complete CMA Foundation first.