Seven persons named P, Q, R, S, T, U and V are sitting in a straight line, all facing north. Each one of them is pursuing one of seven different courses i.e. B.A., B.Com, B.Sc., B.Tech, B.Arch, M.Sc. and M.Tech. Q is fourth to left of R. S is third to right of Р. The person pursuing B.Tech is third to left of R. The person pursuing B.Arch is sitting immediate left of S who is sitting at the extreme end. The persons pursuing M.Sc. and B.Com are immediate neighbours. The persons pursuing B.Sc. and B.Arch are immediate neighbours. V is fourth to left of U. S is not pursuing B.Sc. The person pursuing B.A. is third to left of P. The person pursuing M.Tech is fourth to the right of the person pursuing M.Sc.

Which of the following is/are true based on the given arrangement?

I. The person pursuing B.com is third to left of the person pursuing M.Tech.

II. Only three persons are sitting between Q and R.

III. The person pursuing B.Arch. is sitting second to the right of T.​​

5 boys R, M, N, B and C are sitting in a row facing north (not necessarily in the same order). Only B and R are to the left of M. N is to the immediate right of M. R is not at the ends of the row. Who is sitting to the right of N?

7 boys P, Q, R, S, T, U and W are sitting in a row facing north (not necessarily in the same order). No one is to the right of Q. R is fourth to the left of Q. W is second to the left of R. T is fourth to the right of U. P is not second to the right of U. Who is sitting to the immediate right of P?

P, Q, R, S, T, U and V are sitting in a straight line, facing north. S is sitting second to the left of R. U is sitting fourth to the right of S. Only one person is sitting between P and V. Q is sitting second to the right of V. Only one person is sitting between Q and T. How many people are sitting between S and T?

Six people, A, B, C, D, E and F, are sitting in a row, facing north. F sits to the immediate left of A. C sits third to the left of D. C is an immediate neighbour of A. B sits to the immediate left of E. How many people sit between E and C?

Seven friends, D, E, F, U, V, W and X, are sitting in a straight line, facing north. No one sits to the right of D. Only three people sit between D and F. Only two people sit between F and E. X sits third to the left of V. W sits to the immediate right of V. How many people sit between U and E?

Seven people, L, M, N, O, P, Q and R, are sitting in a row, facing north. Only two people sit to the right of N. Only two people sit between N and R. Only two people sit between L and Q. Q sits to the immediate left of N. O sits to the immediate right of P. Who sits at the third position from the left end of the line?

Six people, E, F, G, H, I and P, are sitting in a row, facing north. Only two people sit to the left of P. Only two people sit between P and E. Only one person sits between E and H. Only I sits between P and G. How many people sit between F and I?