When Your Friends Had Different Answers Than You

When you thought you did well on an exam on a test but you overhear your friends talking about, and they had different answers than you. 

The worst part is when the entire class is divided into two groups and argue over two closely related and possible correct outcomes, but your answer is completely different and nowhere closer to the two of them! Oh man, that sucks! The only way to avoid those terrible situations is to prepare well for a test.