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In this type of questions, some clues regarding seating or placing sequence (linear or circular) of some persons or items is given. The candidate is required to form the proper sequence using these clues and answer the questions accordingly.

Sitting in a row in front of a camera, Mr. X on the left of the person sitting in the centre but is on the right of Mr. Y.
Mr. P is on the right of Mr. Z and Mr. R is on the right of Mr. P.
Mr. R is the second person from the person sitting in the centre.

Who is the person sitting in the centre ? 

Option:
A. Mr. X
B. Mr. Y
C. Mr. Z
D. Mr. R
Answer: C . Mr. Z

Justification:

Mr. X is on the right of Mr. Y and on the left of person in the centre  i.e. Y, X, ---
Mr. P is on the right of Mr. Z and Mr. R is on the right of Mr. P  i.e.  Z, P, R.
R is second from the person sitting in the centre.
So, the order is Y, X, Z, P, R.
Clearly, Z is sitting in the centre. 

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