I'll give you a question, please answer with step-by-step reasoning process.
Sarah opened his chest and found a second heart. Her patient might not be what?\nOptions:\n- istanbul\n- animal\n- antique shop\n- human being\n- bedroom

human being
Human being only has one heart.

Creature with a second heart is not a human being.

Human being is a living being.

Human beings are also called homosapiens.

.

Final answer: human being