There is no limit or control in india to file any false case. Anybody can file any false case on anyone. Especially wife can do anything to anyone by using the law. If you are an indian citizen then there is no way that you can escape from legal terrorism. Your wife is not filing this false case just by herself. Government, police, and judicary all with her side. Imagine how one single innocent person can escape from false case?
Remember f you are NRI you are the very good target for money and legal terrorism.
To get more knowledge on this legal terrorism you should Visit www.498a.org
Read throughly all the posts in the 498a.org forum to understand the indian-police-judicialy-government- false case mechanism. Then you will know what should you need to do next. Also there is a manual freely available 498A Survival Kit "holy book for innocent husbands" written by an NRI husband is available in the website. Google seach and read this book. Finally you will become a master to fight against this terrorism. But remember you are an indian, so there is no option to escape from this false case coming from the govenment.