She flipped to the back of the chapter. For Question #47, the letter was circled.

Panic clamped her chest. She was no longer a resident; she was a protagonist trapped inside a multiple-choice exam.

The book, affectionately terrorized as "Big Katzung" by students, lay open on her call room cot. Its pages were a battlefield of highlighter streaks, coffee stains, and dog-eared corners. But it was the MCQs at the end of each chapter that were her true nemesis.