Correct Answer: 15 – 21

Solution : Let's check the options –
First option: 15 – 21; Both 15 and 21 are multiples of 3.
Second option : 32 – 41; 32 and 41 are two distinct numbers that do not share a common multiple.
Third option: 22 – 27; 22 and 27 are two distinct numbers that do not share a common multiple.
Fourth option: 31 – 35; 31 and 35 are two distinct numbers that do not share a common multiple.

Hence, the first option is correct.