Select the letter-cluster from among the given options that can replace the question mark (?) in the following series.
BZC, EXF, HVI, KTL, ?
- AONR
- BMOR
- CNRO
- DORN
Solution & Step-by-step Explanation
Let's analyze the progression of each position in the letter-clusters:
First letter: B(2)
+3
E(5)
+3
H(8)
+3
K(11)
+3
N(14)
Second letter: Z(26)
−2
X(24)
−2
V(22)
−2
T(20)
−2
R(18)
Third letter: C(3)
+3
F(6)
+3
I(9)
+3
L(12)
+3
O(15)
Combining these gives the cluster NRO.
First letter: B(2)
+3
E(5)
+3
H(8)
+3
K(11)
+3
N(14)
Second letter: Z(26)
−2
X(24)
−2
V(22)
−2
T(20)
−2
R(18)
Third letter: C(3)
+3
F(6)
+3
I(9)
+3
L(12)
+3
O(15)
Combining these gives the cluster NRO.