Concept:The series follows a fixed skip pattern in each letter position.Explanation:Write the positions: PON has P=16, O=15, N=14, so the letters decrease by 1.Check RQP: R=18, Q=17, P=16, again decreasing by 1.Similarly, TSR and VUT also have three letters in reverse alphabetical order.First letters: P(16)→R(18)→T(20)→V(22)→X(24), each step is +2.Second letters: O(15)→Q(17)→S(19)→U(21)→W(23), each step is +2.Third letters: N(14)→P(16)→R(18)→T(20)→V(22), each step is +2.So the next term is XWV.Answer:The correct answer is XWV, which is option C.