Which one is right?

Question

1. (1) There is a item exchange.

1. (2) There is an item exchange.

Answer 1

(2) There is an item exchange

Avoid two vowels such as a and i run together, "a item" by replacing "a" with "an"

Answer 2

There is an item exchange.

Answer 3

"There is an item exchange."

"A" and "an" are articles that operate differently.

Answer 4

You want "an" because "item" starts with a vowel sound. I think that rule has pretty much no exceptions, since it's based on what's easiest to say out loud.