which is the largest religion in the world?

  Which Is The Largest Religion In The World?

1 It reveals that five years ago, there were 2.2

   billion Christians 

2 Muslims are 1.6 billion


Answers:

Christian
Adherents
A Christian is a person who adheres to Christianity, an Abrahamic, monotheistic religion based on the life and teachings of Jesus Christ. "Christian" derives from the Koine Greek word Christós, a translation of the Biblical Hebrew term mashiach. Wikipedia