Answer:
B. 5th line
Explanation:
The symbol (♯) in the key of G major can be found in the 5th line.
The last sharp (in this case the only sharp), F♯, is a half-step below the note G. Therefore, this is the key signature of G major. The second key signature in Example 10 is in bass clef. The last sharp, G♯, is a half-step below the note A.
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