Concept:In a row of 5 persons, equal numbers on both sides means the person is at the middle position.
Use the given left-right neighbours to fix the exact seating arrangement.
Explanation:Statement I: Equal numbers on both sides of A means A is at position 3.
One person sits between A and B, so B can be at position 1 or position 5.
D sits immediately to the left of B.
If B were at position 1, there would be no seat to its left, so this arrangement is impossible.
Therefore, B is at position 5 and D is at position 4.
From A, the first right is D and the second right is B.
So Statement I alone is sufficient.
Statement II: E sits at the extreme left end, so E is at position 1.
Only one person sits between E and A, so A is at position 3.
B sits immediately to the right of D, meaning D and B are consecutive with D on the left.
The only possible consecutive pair is D at position 4 and B at position 5.
Thus, B is second to the right of A.
So Statement II alone is also sufficient.
Answer:Data in either statement I alone or statement II alone are sufficient to answer the question.
Hence, the correct option is D.
