Overall good and very helpful for a resident studying for the Core exam, but there are a few errors that distract from the learning process and means that I can't immediately trust the answers explanations. Some of the errors are simple (wrong answer choice is considered correct, typos that result in no actual correct answer present), but present enough that it is distracting.
Also, the answer explanation box obscures the answer choices so it becomes hard to see why you may have chosen an incorrect answer and if you were to go back to a previous question in a block, you can't pull up the explanation again.
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