Hello
I have recently began to prepare for GMAT using OG '19 guide.
I go through practice questions, and then compare my answers to those in the answer key.
When I discover a mistake, i go to answer explanations.
Today, on question #558 of the Critical Reasoning practice questions, i have found a difference between the answer key and the answer explanations.[u][/u]
Answer Key says the correct is "B" while Answer Explanation says correct is "A".
I should mention, that i have noticed similar inconsistency in one of the Data Suff (Q# 237).
Now, my question is, how often do these discrepancies occur, and should i even rely on Answer Key, or go and check ALL answers with Answer Explanations?
What if by now, not double-checking my correct answers with Answer Explanations, but with Answer Key only, i have much more mistakes than i think i do?
P.S. Can't add screenshots but try and compare yourself.