RRB Technician Grade 1 Model Paper 5

Concept:Find the pattern of letter positions in each cluster and select the one that does not follow it.Explanation:Number the letters by their alphabetical positions: $A=1$, $B=2$, ..., $Z=26$.Check each option for the pattern: $+4$, then $+7$, then $-4$.Option A: $S=19$, $W=23$, $D=4$, $Z=26$$19+4=23$; $23+7=30\equiv 4$; $4-4=0\equiv 26$.Follows $+4$, $+7$, $-4$.Option B: $R=18$, $V=22$, $G=7$, $C=3$$18+4=22$; $22+11=33\equiv 7$; $7-4=3$.The second step is $+11$, not $+7$.So it does not follow the pattern.Option C: $F=6$, $J=10$, $Q=17$, $M=13$$6+4=10$; $10+7=17$; $17-4=13$.Follows $+4$, $+7$, $-4$.Option D: $G=7$, $K=11$, $R=18$, $N=14$$7+4=11$; $11+7=18$; $18-4=14$.Follows $+4$, $+7$, $-4$.Answer:The different letter-cluster is Option B, i.e., $RVGC$.