Explanation:

Let’s break down your question about the limitation period for setting aside a sale in execution of a decree:

- Option 1: 120 days

This isn’t correct. The law doesn't provide this long a period for such applications.

- Option 2: 90 days

Also not correct. This is longer than what’s set in the law.

- Option 3: 60 days

Close, but still not right.

- Option 4: 30 days

This is the correct answer. Under Article 127 of the Limitation Act, 1963, if you want to set aside a sale in execution of a decree, you have 30 days from the date of the sale to file your application.

So, your pick matches the law exactly.