Based on the example question provided here are a couple considerations that may help you make a decision.
Example A removes the bulk of the question from the answer choices and puts it above them, this makes question have less width but more height. So if you intend to make this application scale to mobile devices this would be preferable as it will fit the smaller screens better and you will have less wrapping issues.
Another reason I find Example A preferable is the repetition of what youre choosing between seems redundant (i.e. in this example "List property publicly", "do not list property publicly", since these choices are always directly opposing you will always be essentially reading the question twice as opposed to once and then choosing.
Separation of content
With the question above the answer choices it acts as a sort of header to show where the question begins and the last question ended. With no question above it could appear as you just have a wall of answers with no separation. (NOTE: this assumes you're not separating the questions another way such as borders or blocks)
So in my opinion Example A is the better choice. But in the end all that really matters is consistency, pick one and stick with it.