2 in 
A missing mark before the last semiquaver is most probably Chopin's oversight. The fact that the soloist recalls one of the main themes of this movement in a new, yet well-prepared C major key brings peace after the turbulent orchestral fragment. In this context, a deviation from the original, diatonic course of the phrase does not seem to be justified and sounds strange. The natural added in GE is almost certainly inauthentic, the mark added in EE2 (→EE3) even more so, but the mark added in FEH (probably by the pupil's hand) may be coming from Chopin.
Compare the passage in the sources»
category imprint: Interpretations within context
issues: Annotations in teaching copies, EE revisions, Errors in FE, GE revisions, Omission of current key accidentals, Annotations in FEH
notation: Pitch