Study the following information carefully to answer the given questions:

Certain numbers of persons sit in a row face north. Two persons sit between Q and P. P sits 3rd to the left of L. B sits adjacent to L. Four persons sit between B and Q who sits just right of D. The numbers of persons sit between Q and P is one more than the numbers of persons sit between R and Q. S sits 2nd to the left of R. Two persons sit between S and E. The numbers of persons sit between E and S is same as the numbers of persons sit to the left of E. K sits at one of the extreme ends and two places away from L.

Who sits at the rightmost end of the row?

The correct option is K.

Step-by-Step Explanation:

Let us analyze the given conditions step-by-step to determine the positions of all persons sitting in a row facing North (Left to Right):

1. "Two persons sit between Q and P."
This gives two possible cases for the relative positions of Q and P:
Case 1: Q _ _ P
Case 2: P _ _ Q

2. "P sits 3rd to the left of L."
This means the arrangement relative to P and L is: P _ _ L.

3. "The numbers of persons sit between Q and P is one more than the numbers of persons sit between R and Q."
Since there are 2 persons between Q and P, the number of persons between R and Q must be $2-1=1$ person.

4. "Four persons sit between B and Q who sits just right of D."
This means D is immediately to the left of Q (i.e., D Q).

5. "B sits adjacent to L."
Let us evaluate Case 1: Q _ _ P _ _ L.
Four persons sit between B and Q. Since Q is at position 1 (say), moving to the right: Q (pos 1), P is at pos 4, L is at pos 7. Four persons between Q and B means B is at position 6 (Q _ _ _ _ B). Here B is at position 6, which is adjacent to L (at position 7). This perfectly matches!
So, the arrangement from Q to L becomes: D Q _ P _ B L.

6. "S sits 2nd to the left of R" and 1 person sits between R and Q.
Since Q is at position 2 (after D at position 1):
If R is to the right of Q, R would be at position 4, but P is already at position 4.
Therefore, R must be to the left of Q (1 person between R and Q): R _ D Q.
Since S sits 2nd to the left of R, the arrangement to the left of Q becomes: S _ R _ D Q.

7. "Two persons sit between S and E" and "The numbers of persons sit between E and S is same as the numbers of persons sit to the left of E."
Since 2 persons sit between E and S, and the number of persons to the left of E is also 2, E must be at position 3 from the left end.
Arrangement: _ _ E _ _ S _ R _ D Q _ P _ B L
Counting positions from left:
Pos 1: _
Pos 2: _
Pos 3: E
Pos 4: _
Pos 5: _
Pos 6: S
Pos 7: _
Pos 8: R
Pos 9: _
Pos 10: D
Pos 11: Q
Pos 12: _
Pos 13: P
Pos 14: _
Pos 15: B
Pos 16: L

8. "K sits at one of the extreme ends and two places away from L."
L is at position 16. Two places away from L towards the right means position 18.
Since K is at one of the extreme ends, K sits at position 18, which is the rightmost end of the row.

Final Seating Arrangement (Left to Right):
_ , _ , E , _ , _ , S , _ , R , _ , D , Q , _ , P , _ , B , L , _ , K

Therefore, K sits at the rightmost end of the row.