Which key is appropriate for the marked measures?

ANSWER

The same figures with the previous passage appeared again in a different key. The first chord is the dominant 7th chord of the new key leading to the tonic in the 25th measure. The tonic chord in the new key consists of Eb, G and Bb. Correct answer is 4.
Which key is appropriate for the marked measures?
ANSWER
The same figures with the previous passage appeared again in a different key. The first chord is the dominant 7th chord of the new key leading to the tonic in the 25th measure. The tonic chord in the new key consists of Eb, G and Bb. Correct answer is 4.