You have five candidates: P, Q, R, S, and T. The selection rules are: 1) P cannot be selected if Q is selected. 2) R must be selected if S is selected. 3) T can only be selected if P is not selected. Which of the following selections is permissible?
In a selection of three items from the following: A, B, C, D, and E, the conditions are: 1) A cannot be selected if B is selected. 2) C must be included if D is included. 3) E can only be included if A is not included. Which of the following groups is valid?