Correct option is B
Given pair: 11 : 123
Logic: Number² + 2 = Second number
11² = 121 → 121 + 2 = 123
Now apply the same logic to 6:
6² = 36 → 36 + 2 = 38
Now test the options:
A. 10 : 1001
10² + 2 = 100 + 2 = 102
B. 14 : 198
14² + 2 = 196 + 2 = 198 (Follows)
C. 13 : 169
13² + 2 = 169 + 2 = 171
D. 18 : 321
18² + 2 = 324 + 2 = 326
Thus, correct option is (b).