Well there have been many amendments to 498a. In which state.City are you?
Make sure to buy a cell phone which records each and every conversation. Have some gadgets like a pen with Camera and record every dam thing where you are harassed (if at all thats a case)
If you have documents to assure you are separated from last 2 years, you can always show it to the IO. You will get a call from women police cell now. Dont be afraid stay calm always. Defence is the best attack. Being a man in this country you dont have any right. And 498a and DV are such weapons which wives shoot on you and if you defend yourself well, the bullet goes back to them and they are beaten by their own stick.
Also start getting in touch with as many people who are facing same problems. I have ,reated a group on meetup, there are a few influential people who can really help you well.
Keep your head cool.
Fight hard.