Displeasure is to disapprobation as conviction is to belief.

I'm going to assume you are asking this as a true or false statement so the answer you are looking for is True. Disapprobation means a strong disliking for so it is a synonym for displeasure. Conviction is a set choice or mindset in doing something so it is also a synonym for belief, making both sides of the statement synonyms means that comparing the two would be a true statement.