Which letter will replace the question mark (?) in the following series?
F, J, D, H, B, F, ?
Correct Answer: Z
Subject: Logical Reasoning
Explanation: The series follows an alternating pattern composed of two sequences decreasing by 2:
1st sequence: F (-2) -> D (-2) -> B (-2) -> Z
2nd sequence: J (-2) -> H (-2) -> F
Therefore, the missing letter at the question mark is Z.