You have to "fail" the test kinda but not really. The first 3 answers need to be correct and then the last question will have 4 answers but if you get the first 3 correct then it doesnt matter which you pick. After that she will say you need to go to a lesson. Which is the lesson at the hospital. After that you will go back and pass the test with the 5th answer, but you still need to get the first 3 right.
Answers:
-superior to both
-at least as large as male average
-first futa, man and woman subspecies
-elastic throat (option available after going to the doctor at evening)
They've changed it since my original comment. You no longer need to "fail" to trigger the rest, also its only 4 answers now. Just go to the hospital in the evening to get the last answer.