If A and C interchange their places, B and D interchange their places, E and G interchange their places and so on for rest of the letters in the alphabet, then which letter will be 5th to the left of O?

Given: If A and C interchange their places, B and D interchange their places, E and G interchange their places and so on.

Swapping pattern:
A ↔ C, B ↔ D, E ↔ G, F ↔ H, I ↔ K, J ↔ L, M ↔ O, N ↔ P, Q ↔ S, R ↔ T, U ↔ W, V ↔ X, Y ↔ Z

After swapping sequence will be: CD AB GH EFKL IJ OP MN........

O at 13th position.

Therefore, 5th to the left of O is F.

Thus, the correct option is (c) F

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