Logical Reasoning series: Solving questions on seating arrangement Part I

Questions on the seating arrangement are frequently seen in the logical reasoning section of the competitive exams. Most of the time, questions on seating arrangement if decoded properly can fetch you more marks because they come with a set of sub-questions in connection to the plot. Seating arrangement could be in a linear form, circular/round-the-table format, or even in a complex arrangement to increase/decrease the difficulty level of the question. Hence to the right of B is D. Can you solve the following: P, Q, R, S and T are sitting on a bench.