is 何に pronounced (1) なんに or (2) なにに here: お飲み物は何になさいますか。?
(1) www.youtube.com/watch?v=fU-hnuSM098 @0:20 provides evidence (NB: despite the possibly incorrect ローマ字 (roumaji) found there and in the "show more" vocab list) "お飲み物は何になさいますか。Onomimono wa nanni nasaimasuka?"
(2) but evidence from my Japanese keyboard's programming would suggest なにに is correct because 何に doesn't pop up if I type なんに.
Finally, I thought even if it is なんに "nan ni", the mechanics of releasing the ん to transition to the articulation of に necessarily produces a sound similar to なにに
Please let me know, which is correct? (and if possible with a grammatical explanation to understand why) thank you all for your kind assistance!