If T's appointment is immediately after P's appointment and immediately before W's appointment, then which one of the...

ReneF on February 3, 2021

The mistake you may have made with this one and chose B is failed to read the entire question stem. If you only applied the PT block and not the PTW, then B would be an attractive answer. But if you apply the entire condition PTW you realize T can not be in the-3rd position for that would put P in 2, leaving just position 1 for U (U-before-P) and Q( Q-before-W), therefore R must be in position 3. with the PTW block coming after the RS Block, therefore answer choice (D) "R must be before P" is the correct answer.
The mistake I often make is rushing and reading half the question and assuming; you know what they say about assuming.....