Select the option in which the number pair does NOT share the same relationship as
that shared by the given number pair.
9 : 734

Given pair : 

9 : 734 

The pattern followed here is : 

Cube of the first number added with 5 give the second number.

i.e; $$9^3+5\ =\ 729+5=734$$

Lets see options : 

• Option A = 6 : 221 :- $$6^3+5\ =\ 216+5=221$$
• Option B = 4 : 71 :- $$4^3+5\ =\ 64+5=69\ne\ 71$$
• Option C = 8 : 517 :- $$8^3+5\ =\ 512+5=517$$
• Option D = 7 : 348 :- $$7^3+5\ =\ 343+5=348$$

So, Option B is not sharing the same relationship as that shared by the other options. 

Hence, Option B is correct.