OE 13 is related to MC 17 in a certain way. In the same way, FL 16 is related to DJ 20. To which of the following is RD 15 related to following the same logic?

Given:

OE 13 is related to MC 17

FL 16 is related to DJ 20

Logic: Letter -2 and digit +4

OE 13 is related to MC 17:
The first letter: O → M (Shifted backward by 2 letters).
The second letter: E → C (Shifted backward by 2 letters).
The number: 13 → 17 (Increased by 4).
FL 16 is related to DJ 20:
The first letter: F → D (Shifted backward by 2 letters).
The second letter: L → J (Shifted backward by 2 letters).
The number: 16 → 20 (Increased by 4).
Now, for RD 15:
The first letter: R → P (Shifted backward by 2 letters).
The second letter: D → C (Shifted backward by 2 letters).
The number: 15 → 19 (Increased by 4).
So, RD 15 is related to PC 19.

Correct answer is (c) PB 19.