The 
raising c2 to c
2 at the end of bar appears only in FESch (written in), FE4 and EE2. The absence of this accidental constitutes an undoubted oversight by Chopin in [A] – cf. e2 and not e
2 in an analogous passage in bars 91-92.
Compare the passage in the sources »
category imprint: Differences between sources
issues: EE revisions, Omission of current key accidentals, Authentic corrections of FE, Annotations in FESch
notation: Pitch