Which number will best complete the relationship given below?
13 : 38 :: 17 : ?

Correct option is B

Given: 13 : 38 :: 17 : ?
The first pair is 13 : 38.

13×3−1=38

Now, let's apply the same pattern to the second pair 17 : ?:

17×3−1=51−1=50

So, the number that best completes the relationship is 50.

The correct answer is (B) 50.