Study the following information carefully and answer the questions given below. Nine persons sit in a linear row such that three of them face south direction and the rest of them face north direction. Not more than two persons sit adjacent to each other face the same direction. Six persons sit between H and P who is the only neighbour of R. G sits 3rd to the right of W who sits 2nd to the right of H. The Number of persons sit to the right of G is less than the number of persons sit to the left of G. U and L sit immediately left of each other. O sits 2nd to the right of L who faces the same direction as W. J sits to the right of O.

Four of the following five pair are alike in a certain way and forms a group, then which of the pair doesn’t belong to that group?

The correct answer/option is O.

Let's solve the linear arrangement step-by-step based on the given information:

1. Understanding the Basic Setup:
- There are 9 persons sitting in a linear row.
- 3 persons face South and 6 persons face North.
- Not more than two adjacent persons face the same direction (i.e., at most 2 consecutive people can face North or South).

2. Analyzing Key Clues:
- "P is the only neighbour of R."
This means P and R must be at one of the extreme ends of the row. Specifically, R is at an extreme end, and P is adjacent to R on the inner side (either [R, P, ...] at the left end or [..., P, R] at the right end).
- "Six persons sit between H and P."
Counting positions: P is at position 2 (or 8). Between P and H there are 6 persons, so H is at position 9 (or 1) at the opposite end.
- "G sits 3rd to the right of W who sits 2nd to the right of H."
Since H is at an end, let's analyze H's direction. If H is at position 1 and faces North, W is at position 3. But W is 2nd to the right of H, so H must face North if at position 1. Then G is 3rd to the right of W.
Let's place positions 1 through 9 from Left to Right:
Case 1: R is at position 9, P is at position 8.
Then H is at position 1 (since 6 persons sit between H and P: positions 2, 3, 4, 5, 6, 7).
- H sits at pos 1. Since W is 2nd to the right of H, H must face North, placing W at pos 3.
- G sits 3rd to the right of W. If W faces North, G is at pos 6. If W faces South, G would be at pos 0 (invalid). So W must face North, and G is at pos 6.
Now let's check: "The number of persons sitting to the right of G is less than the number of persons sitting to the left of G."
To the left of G (positions 1 to 5) there are 5 persons. To the right of G (positions 7 to 9) there are 3 persons. Since 3 < 5, this condition is satisfied!

3. Placing Remaining Persons (U, L, O, J):
- The vacant positions are 2, 4, 5, 7.
- "U and L sit immediately left of each other."
This means U and L sit adjacent to each other (positions 4 and 5), facing opposite directions (one North, one South) so that each is to the immediate left of the other.
- "O sits 2nd to the right of L."
If L is at pos 5 and faces North, 2nd to the right of L is pos 7, so O is at pos 7. Then U is at pos 4.
Position 2 is then occupied by J.
- "J sits to the right of O."
Since J is at pos 2 and O is at pos 7, for J to be to the right of O, O must face South.
- "L faces the same direction as W."
Since W faces North, L also faces North.
With L at pos 5 facing North, 2nd to the right of L is indeed pos 7 (O).
Since U and L are immediately left of each other, and L (at pos 5) faces North (so her immediate left is pos 4), U must be at pos 4 facing South (so his immediate left is pos 5). This works perfectly!

4. Determining Directions:
- H (pos 1): North
- J (pos 2): South (to avoid 3 consecutive North/South, let's check: H is North, J is South)
- W (pos 3): North
- U (pos 4): South
- L (pos 5): North
- G (pos 6): North
- O (pos 7): South
- P (pos 8): North
- R (pos 9): North
Let's check the number of South-facing persons: J(South), U(South), O(South) = 3 persons facing South. Exactly 3 persons face South, and the remaining 6 face North!

5. Evaluating the Options:
Let's check the direction of each person given in the options:
- L faces North
- G faces North
- W faces North
- P faces North
- O faces South

Four of the five persons (L, G, W, P) face North, forming a group. O faces South and does not belong to that group.