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Among seven singers standing in a line, who is on the second extreme right?

There are eight books stacked one over the other. The stack consists of two books on Organizational Behaviour, two on TQM, three on Industrial Relations, and one on Economics. Which book is the last book from the top?

Five boys are standing in a row facing East. Pavan is to the left of Tavan, Vipin, and Chavan. Chavan is between Tavan and Vipin. If Vipin is fourth from the left, then how far is Tavan from the right?

Six persons M, N, O, P, Q, and R are sitting in two rows with three persons in each row. Q is not at the end of any row. P is second to the left of R. O is the neighbour of Q and diagonally opposite to P. N is the neighbour of R. Who is in front of N?

Seven persons T, B, L, A, P, Z, and R are standing in a row facing East. T is to the right of R; A is between B and Z; L is third to the left of B and is at the end; R is fourth to the right of L. Who is at the immediate right of T?