Depending on where you go in the world, some people will refer to a carbonated beverage as "soda" while others choose to use the term "pop." For example, "Can I get you a soda" vs. "Can I get you a pop." I assume they both came from "soda pop" and were shortened at some point.
My question is if one is considered more correct or if they are both on equal footing? Also, are there certain parts of the US where it is just incorrect to use one or the other?