Concept:The series follows a fixed skip pattern in the first letter, with each term made of three consecutive descending letters.Explanation:Look at the first letters: Z,V,Q,M,H.The differences are Z→V=−4, V→Q=−5, Q→M=−4, M→H=−5.So the pattern alternates −4,−5.Next difference should be −4.Thus H−4=D.The next term starts with D and has consecutive descending letters: D,C,B.So the missing term is DCB.