Review Question - QID 214429

An 8-year-old boy is brought to the emergency department with a painful swollen knee after he fell in gym class. His teacher says that he was running around playing dodgeball when he tripped and fell on his knee. Immediately afterwards, he was found to have a swollen right knee, and he was unable to walk due to pain. He has no significant past medical history, and his family history is unknown because he was adopted at birth. Physical exam reveals an anxious boy with a hematoma on his left arm and a tender red swollen right knee. Skin exam reveals numerous small abrasions but no other findings. Which of the sets of results shown in Figure A would most likely be seen in this patient?