1. Correct Answer: Option D: Neither 1 nor 2
 2. Explanation:
     Let's analyze the given statements:
     ● True Statement: One of P and Q was selected for the job.  
           ○ This means either P or Q, but not both, was selected.
     ● False Statement: At least one of R and S was selected for the job.  
           ○ Since this statement is false, it means neither R nor S was selected.
     ● True Statement: At most two of R, S, and T were selected for the job.  
           ○ Since neither R nor S was selected (from the false statement), T could be selected or not, but the statement remains true as at most two of them could be selected.
     Now, let's evaluate the conclusions:
     ● Conclusion 1: At least four were selected for the job.  
           ○ Since only one of P or Q was selected, and neither R nor S was selected, the maximum number of candidates that could be selected is 2 (either P or Q, and possibly T). Therefore, this conclusion is false.
     ● Conclusion 2: S was selected for the job.  
           ○ From the false statement, we know that neither R nor S was selected. Therefore, this conclusion is also false.
     Since neither conclusion 1 nor conclusion 2 is true, the correct answer is Option D: Neither 1 nor 2.