Correct Answer: 206

Solution : Given:
54 : 90 :: 134 : ?

The sum of the digits of the numbers given in each pair is equal.
Like, 54 : 90 – 54→5 + 4 = 9
90→9 + 0 = 9
Similarly, follow the same pattern for 134 : ? – 134→1 + 3 + 4 = 8
Let's check the given options –
First option: 206→2 + 0 + 6 = 8
Second option: 202→2 + 0 + 2 = 4 ≠ 8
Third option: 208→2 + 0 + 8 = 10 ≠ 8
Fourth option: 186→1 + 8 + 6 = 15 ≠ 8

So, 134 is related to 206. Hence, the first option is correct.