how to dismiss dv on jurisdiction ground

First contact any advocate that is expert in such law and find out the correct stand of your wife, before assuming any thing. on your own.

Simple.  File Objections in DV case about maintainability of the case.  But DV case can be filed where part of cause of action arises.  And, you can file transfer petition in SC to transfer the case to Delhi, where both are residing and you will definitely get it transferred.