b. 48
In A (→GC,FE1→FE2) there are no accidentals before the upper notes of the last two sixths, g2 and b2. It is a typical inaccuracy of notation of Chopin, which does not result in any doubts in this context. Moreover, FE1 (→FE2) has no raising b1 to b1. In FE3 both necessary naturals were added, the same notation also occurs in EE. Only GE has the correct text in this bar.
Compare the passage in the sources»
category imprint: Interpretations within context; Differences between sources; Editorial revisions
issues: EE revisions, Errors in FE, Accidentals in different octaves, GE revisions, FE revisions, Inaccuracies in A
notation: Pitch