Question
Four of the following five are alike in a certain way
and hence they form a group. Which one of the following does not belong to that group? Study the following information carefully and answer the questions given below: Eight couples are sitting in two parallel rows containing four benches in each row in such a way that there is an equal distance between adjacent couples. In the first row, four couple i.e. A, B, C, D, E, F, G and H are seated and all of them are facing south. In the second row, four couples i.e. M, N, O, P, Q, R, S and T are seated and all of them are facing north. Therefore, in the given seating arrangement, each couple seated in a row faces another couple of the other row. Two persons sit on each bench. Five persons sit between B and E, who sits at one of the extreme end. There are two benches gap between Q and R, who sits at one of the extreme end. D faces to the one who sits exactly between R and Q, who does not sit at the extreme end. There are three persons sit between G and D. T sits 2nd to the left of the one who faces to E. Both P and M, are seat on same bench. More than one person sit between M and T. A sits 2nd to the left of F. Both F and H are not sitting on the same bench. There is one bench gap between N and O, who does not face D. There is one bench gap between H and C. H does not face P. One person sits between C and D. ÂSolution
From the given statements, there are two benches gap between Q and R, who sits at one of the extreme end. Here we get two possibilities i.e. Case 1 and Case 2. D faces to the one who sits exactly between R and Q, who does not sit at the extreme end. There are three persons sit between G and D. There are 5 persons sit between B and E, who sits at one of the extreme end. 
From the given statements, T sits 2nd to the left of the one who faces to E. Here Case 1 is ruled out now. Both P and M, sit on same bench. More than one person sit between M and T. One person sit between C and D. Here one more possibility is added – Case 2a. There is one bench gap between H and C. H does not face P. A sits 2nd to the left of F. 
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