Six friends P, Q, R, S, T and U are sitting around a circular table facing towards centre. The angle made at the centre of the
circle by the straight lines from P and Q is 180°; from Q and R is 120°; from R and S 180°. T is not sitting on the immediate
left of R while R is not on the immediate right of P. On the basis of the above information which of the following
statements is definitely true?