Correct Answer: 37 : 73

Solution : Given:
53 : 35 (When the order of the digits of 53 is reversed, the resulting number is 35.)

First option: 37 : 73; Reversing the order of the digits of 37 yields the number 73.
Second option: 42 : 22; Reversing the order of the digits of 42 yields the number 24 but the number given here is 22.
Third option: 16 : 62; Reversing the order of the digits of 16 yields the number 61, but the number given here is 62.
Fourth option: 54 : 43; Reversing the order of the digits of 54 yields the number 45, but the number given here is 43.

Hence, the first option is correct.