Final answer:
The right atrium receives deoxygenated blood, while the left atrium receives oxygenated blood.
Step-by-step explanation:
The right atrium receives deoxygenated blood from the body. The left atrium receives oxygenated blood from the lungs. Therefore, the deoxygenated blood is associated with the right atrium (Option A) and the oxygenated blood is associated with the left atrium (Option B).