Seven persons P,Q,R,S,A,B and D are sitting one above the other on a ladder (not necessarily in the same order). B sits neither at the top nor at the bottom. Only four persons sit between P and R. S sits immediately above A. Only on persons sits between R and D. D sits below S. B sits above Q.

Three of the following are similar in a certain way based on their seating arrangement and form a group, which of the following does not belong to that group?

Seven persons: P, Q, R, S, A, B, and D are sitting one above the other on a ladder.

B sits neither at the top nor at the bottom.

Only four persons sit between P and R.

S sits immediately above A.

Only one person sits between R and D.

D sits below S.

B sits above Q.

From the given information arrangement will be:

S D both are on even ladder.

B Q both are on odd ladder.

P A both are on odd ladder.
(D B) : D is on even and B is on odd ladder

So, does not follow pattern, it stands out as the one that doesn’t belong to the group.

Thus, correct answer is (d) DB