Final answer:
Miley Cyrus met Liam Neeson on the set of "The Last Song" and he proposed to her with a 3.5-carat diamond ring.
Step-by-step explanation:
The subject of this question is about the relationship between Miley Cyrus and the person she met on the set of "The Last Song" and who proposed to her with a 3.5-carat diamond ring. The correct answer to this question is b) Liam Neeson.