If Liquid Methyl Amine and Hydrofluoric Acid Were Mixed, Between

Multiple Choice

If liquid methyl amine and hydrofluoric acid were mixed, between which two atoms in these molecules would a hydrogen bond form?

A) between 4 and 5, between 2 and 5, or between 3 and 6
B) between 2 and 5 only
C) between 3 and 6 only
D) between 4 and 5 or 2 and 5