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 direction but they do not sit adjacent to each other. E sits third to the left of D and faces opposite direction to D. G sits third to the right of C. Both the immediate neighbors of G face same direction. H sits to the right of F.

Who among the following sits just right of B?

To determine who sits just right of B, we can analyze the given information step-by-step to construct the arrangement of the eight persons in the row.

Step 1: Analyze the positions of A, B, and C.
- Three persons sit between A and B, and one of them sits at one of the ends of the row.
- C sits second to the right of B, and B faces North.
Since B faces North, C must sit to the right of B with one person in between: B _ C.
If we place B at the extreme left end (Position 1), then:
- Position 1: B (facing North)
- Position 2: _
- Position 3: C
- Since three persons sit between A and B, A must be at Position 5 (1 + 3 + 1 = 5). This satisfies the condition that B is at the end of the row.

Step 2: Place D and E.
- D and B face the same direction (North), but they do not sit adjacent to each other. Thus, D faces North and cannot be at Position 2.
- E sits third to the left of D, and E faces the opposite direction to D (South). Since D faces North, third to the left of D means E sits three positions to the left of D: E _ _ D.
- Testing possible positions for D:
- If D is at Position 7, then E is at Position 4 (7 - 3 = 4). This fits perfectly as Position 4 is currently vacant.
Now the arrangement looks like:
Position 1: B (North)
Position 2: _
Position 3: C
Position 4: E (South)
Position 5: A
Position 6: _
Position 7: D (North)
Position 8: _

Step 3: Place G and determine directions.
- G sits third to the right of C. If C faces North, G is at Position 6 (3 + 3 = 6). If C faces South, G would be out of the boundary of the row. Thus, C faces North, and G is at Position 6.
- Both the immediate neighbors of G face the same direction. The neighbors of G are A (Position 5) and D (Position 7). Since D faces North, A must also face North.
- There are 4 persons facing North and 4 facing South. We have already identified 4 facing North: B, C, A, and D. Therefore, the remaining persons (E, G, F, and H) must face South.

Step 4: Place F and H.
- The remaining vacant spots are Positions 2 and 8.
- H sits to the right of F. Since F faces South, F's right direction points towards the left of the row. Therefore, H must sit to the left of F, meaning H is at Position 2 and F is at Position 8.

Final Arrangement:
1. B (North)
2. H (South)
3. C (North)
4. E (South)
5. A (North)
6. G (South)
7. D (North)
8. F (South)

Since B faces North, the person sitting just to the right of B is the one at Position 2, which is H.