日本語の発音について聞いているのなら、イギリスはigirisuです。

The first one. It comes from Portuguese, but the n was dropped.

イギリスの発音は「Igirisu 」です

Thank you :D

Ah, it's 鼻濁音 for がぎぐげご, however for us, it doesn't sound インギリス...It's hard to explain. I think you will be able to find some web pages with 鼻濁音.