Concept:The question tests the ability to identify consecutive letter pairs in the English alphabet sequence.Explanation:Examine each pair: QR – Q and R are next to each other in the alphabet. ST – S and T are consecutive. UV – U and V are consecutive. WX – W and X are consecutive. WZ – W and Z have two letters (X and Y) between them, so they are not consecutive. Only WZ breaks the pattern of immediate adjacent letters. All other options are correct consecutive pairs.Answer:The incorrect pair is WZ, which corresponds to option D.