I told someone the other day, much to his surprise that I was a Christian. He asked whether I though my religion was the only true religion to which I replied yes. He seemed somewhat 'offended' by this and sneered at me, strange given that he's a staunch atheist but I guess that's the nature of the world today.
But I wondered, what is the best response to give when someone asks if you think that your religion is the only one.