A man stands on his left foot. He holds his right thigh parallel to the ground with his right (lower) leg perpendicular to the ground. Which of the following is true?
His left knee is extended, but his right knee is hyperextended.
His left knee is flexed, but his right knee is extended.
His left and right knees are flexed.
His left knee is extended, but his right knee is flexed.
His left and right knees are extended.