How is the word (turned) used in the following sentence?

When it came to autumn,my thoughts often turned to the years I had spent
quarterbacking my high school football
team.
A. Subject C.Direct object
B. Verb D.Object of preposition
Answer :B
Is it correct

yes

B is correct.

Y-E-S Yes.it is very obvious

Yes, the word "turned" is used as a verb in the given sentence. It is the action that the subject (my thoughts) is performing. So, the correct answer is B. Verb.