Concept:Check the positions of letters in the alphabet and compare the gaps between them.Explanation:Take A=1, B=2, ..., Z=26.For EHK: E=5, H=8, K=11, so gaps are +3 and +3.For ZBD: Z=26, B=2, D=4, so cyclic gaps are +2 and +2.For LOR: L=12, O=15, R=18, so gaps are +3 and +3.For SVY: S=19, V=22, Y=25, so gaps are +3 and +3.Only ZBD follows a +2 gap pattern; all others follow +3.
