Dear Raju,
Your post does not give much details. Secondly, the way you have presented it, it looks like a one sided attempt by the management to remove you. You have also said that they are "trying" to remove you, so possibly you are still with them.
Keeping all this in mind i suggest the following questions that you should answer
1. Is the role, for which you have been taken, in line with your capabilities & interest ?
2. Are you able to cope up with the work pressure ?
3. Is the culture of company in tune with your individual nature & values ?
4. Can you say with absolute surety that there has been nothing wrong on your part in last 3 month or so since you joined them ( either behavioral or functional) ?
5. Have you had good relations with your immediate supervisor & colleagues in the short period that you have been with the company ?
These questions will at least help you know the facts about your standing. If your answers to all or at least 4/5 questions are "Yes" you have a case.If the answers are no, please look for a change.
Actionable in case of Yes:
1. speak to your department supervisor for his advise, and in case he is the person asking you to leave, request him to explain the reasons.
2. In case the supervisor is not helpful, meet the HR or any other senior within the company whom you can talk to. 3. Remember, be polite & have the attitude of a person who wants to understand the situation. Aggression will only serve the purpose of flaring up egos
You can do many other things which have been suggested in other posts above, but believe me, the company management would have covered their back before deciding to terminate you, so confrontation will not help.
Best Wishes to you. I hope you are able to resolve this amicably
Subramani