Eight friends A, B, C, D, E, F, G and H are sitting around a circle facing the centre. A sits third to the left of B and second to the right of F. D does not sit next to A or B. C and G always sit next to each other. H never sits next to D, and C does not sit next to B. Which of the following pairs has only one person sitting between them, if the counting is done in the clockwise direction?

A, B
C, D
F, E
G, H

Correct answer: F, E

Solution

The clues allow a unique circular arrangement after placing A, B, and F first. Then the adjacency restrictions for C-G, D, and H narrow the remaining positions. In the final arrangement, F and E have exactly one person between them clockwise.

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