Which harmonies are the most appropriate for the notes in the rectangle?

ANSWER

The first chord consists of A, C, and Eb so it could be analyzed as a diminished chord. But F of the previous chord can be considered as it still remains since the passage is fast. Considering the chord progression, it is more reasonable interpretation to regard the first chord as a secondary dominant chord. The second chord is resolved by the following dominant chord. Correct answers are 1 and 4.
Which harmonies are the most appropriate for the notes in the rectangle?
ANSWER
The first chord consists of A, C, and Eb so it could be analyzed as a diminished chord. But F of the previous chord can be considered as it still remains since the passage is fast. Considering the chord progression, it is more reasonable interpretation to regard the first chord as a secondary dominant chord. The second chord is resolved by the following dominant chord. Correct answers are 1 and 4.