Dude, dont freak out. You did nothing wrong.In my humble opinion, you really dont have to say anything. Firstly I think you should be sure about which is your first choice in case they want you to choose.Since you are probably talking about a big bank, they might not even realize. Frankly, if they discovered I dont think they will care. They might ask you what happened and you should tell them the truth. Its not something to be embarrassed about, really. You thought you had been rejected because you hadnt heard about them for a while.Take it easy.Also - try to not have to choose until the very end. Just in case, they tell you you have to go for one option, IB for example, and then you get rejected. That way you can move forward with your second choice. (which of course, in from of the interviewing people will always be your very very first choice and so on...)hope this helped