Correct option is C
Information Given:
Series:
3 6 5 4 1 2 5 8 9 7 4 5 6
Find odd digits that are:
Immediately preceded by an even digit.
Immediately followed by an odd digit.
Logic:
Check every odd digit for the pattern Even – Odd – Odd.
Explanation:

Total such odd digits = 1
Final Answer:
1
Final Correct Option:
C (One)