Correct Answer - Option 3 : 189
The logic follows here is:
First number : (First number)2 - (First number/2) = Second number
12 ∶ 138 → 12 : 122 - 12/2 = 12 : 144 - 6 = 138
Similarly,
14 : ? → 14 : 142 - 14/2 = 14 : 196 - 7 = 189
Hence, "189" is the correct answer.