Quiz: Which Japanese is correct?

I am a Kansai native living in Osaka, Japan. I always speak Kansai dialect. A friend came to visit me from Tokyo. So, my friend and I decided to go to Dotonbori. Dotonbori is a famous restaurant district. We are eating okonomiyaki in a restaurant. This is the conversation between the two of us at that time.  (　　　) Which is the most appropriate word to go inside?

友だち : じつは　ぼくは　ことし　かの女とけっこんをするんだ。

わたし : （　　　　）

1 : さようですか？

2 : ほんま？

3 : Really?

Please comment below, easily!