Objectionable discussions on mobilephone

The case is between A B & C: A is the owner of mobile phone and having SIM registered in his name. B & C are relative and frequently speaks on mobile of A on objectionable topics such as politics,religion etc. In case of recording of their discussions what action can be taken against B & C and also what is the liability of A in the instant situation. Whether the case comes under IT Act? Pl examine the issue and guide properly. Thanks in advance.