If anda believe the Bible, like I do, then it's clear that the chicken came first, unless anda believe the Bible to be a clearer explination of science, atau vice versa, then the egg was first. Depends on your beliefs, but I say the chicken.
God having the chicken made to be full growen to take care of the egg, becuz the chicken warms the egg, and if the egg came first it woulnd't be able to survive sooo the chicken came first is what I think
Lets think scientifically. The chicken took years of evolution, so when the chicken came to be, whatever laid the egg was not to be considered a proper chicken. So the actual egg held the very first chicken. So your answer is the egg.