In each of the following questions, two numbers are given which follow a certain logical or arithmetic relationship. Identity the same pattern and apply it to find the missing number in the second pair. Choose the correct option from the given alternatives.
51728 : 73940 :: 38641 : ? ​​

Given: 51728 : 73940 :: 38641 : ?

Logic: Digits of the number are increasing + 2 place.

For, 51728 : 73940

5 + 2 = 7, 1 + 2 = 3, 7 + 2 = 9, 2 + 2 = 4, 8 + 2 = 0

Similarly,

38641 : ?

3 + 2 = 5, 8 + 2 = 0, 6 + 2 = 8, 4 + 2 = 6, 1 + 2 = 3

So, 38641 : 50863

Thus, correct option is (a).