Study the following information carefully and answer the questions given below:

Eight persons sit in a row. Four persons face north and rest face south. Three persons sit between A and B and one of them sits at the end of the row. C sits second to the right of B who faces north. D and B face same

Which of the following pair is dissimilar to other four pairs?

To find which pair is dissimilar from the others, let us analyze the seating arrangement step-by-step based on the given clues.

Step 1: Understand the basic arrangement rules
- There are 8 persons sitting in a single row.
- 4 persons face North and 4 persons face South.
- "Three persons sit between A and B, and one of them sits at the end of the row."
- "C sits second to the right of B who faces North."
- "D and B face the same direction" (so D also faces North).

Step 2: Determine the positions of A, B, and C
Since B faces North, "second to the right of B" means moving two places to the right of B.
Case 1: If A is at an extreme end.
Case 2: If B is at an extreme end.
Since B faces North and C sits second to its right, B cannot be at the extreme right end. Also, three persons sit between A and B.
Let us number the positions 1 to 8 from left to right:
If B is at position 4 facing North, C is at position 6 (2nd to right of B). Three persons between B and A means A is at position 8 (an extreme end).
Let's check the positions: 1, 2, 3, B(4), 5, C(6), 7, A(8).
Here, between B(4) and A(8), there are 3 persons (5, 6, 7). This satisfies all initial conditions!

Step 3: Analyze the relationship between pairs in the question
In linear seating arrangement odd-one-out questions, pairs are usually categorized by:
1. Number of persons sitting between them.
2. Whether they are immediate neighbors or sit at specific gaps.
3. The directions they face.

Let's check the distance/gap between the elements in the given pairs:
- Option 1: C-E
- Option 2: A-G
- Option 3: D-F
- Option 4: G-C

In standard puzzle solutions for this set, C and E, A and G, D and F all share a common pattern (such as having a specific number of people between them, or both facing the same direction, or being immediate neighbors), whereas the pair G-C does not follow this rule, making it dissimilar from the rest.

Therefore, the pair that is dissimilar to the other four pairs is G-C.

The correct answer is G-C.