Difficulty 10 out of 10 (10 = most difficult)
Chemical Structure of Pharmaceutical Drugs is the most difficult category. The Gamemaker knows little about chemistry; so, despite the multiple choice game format, these images might actually be impossible to answer within the given time limit.
If you know chemistry, and think that this collection is futile, post your comments below.
Brain Bout might remove this category in the future, or at least remove it from public game rooms. Until then, know that selecting this category in a private game room might quickly clear the room of all contestants!
This category contains 1,757 entries at the time of this writing.