General Studies · Number Analogy

Below are two sets of numbers. In each set, performing certain mathematical operations on the first number yields the second number, and performing operations on the second number yields the third number, and so on. Which of the following options follows the same set of operations as those followed in the given sets? (Note: The operations must be performed on the whole numbers without breaking them down into their constituent digits. For example, operations can be performed on 13, such as adding/subtracting/multiplying by 13. Breaking 13 into 1 and 3 and then performing mathematical operations on them is not allowed.) 15-60-64-68; 16-64-68-72