Which of these is NOT the name of an album released by English singer-songwriter Adele?
Explanation
The answer is 12 because it is not the name of an album released by English singer-songwriter Adele. All the other options, namely 19, 21, and 25, are the titles of Adele's three highly successful albums. 12 has not been released as an album by Adele, indicating that it is the correct answer to the question.