jmjinks jmjinks:
I messed up the same question as natooke, as I figured 2/5 of the world's population is in China and India, and nether country is predominantly Christian, so I assumed Buddhism might be a good option.
If I hadn't have done a bit of research on it recently, I would have messed that one also.
See "Christanity" takes into account all roman catholics, christians, prodestants and every other off-shoot around, so it is little numbers that just add up.
There are actually over 1 billion "christians" in the world, and Muslim was 2nd but not by much.
I am still disappointed in my geography mistakes, as I am normally very good in it.