Select the correct match.

Which of the following statements is correct?

What is the approximate amount of $CO_2$ eliminated by our lungs per day?

What is the respiratory rate in a rabbit?

Whales are air-breathers but can live underwater for a long time because they possess:

Select the correct option:
$(1)$ The respiratory rhythm center for breathing regulation is located in the medulla oblongata of the brain.
$(2)$ Each hemoglobin molecule can carry a maximum of $4$ molecules of $O_2$. (Note: The original question mentioned $CO_2$,which is incorrect; hemoglobin primarily transports $O_2$.)