Option C: (b) and (c)
Statement (b) is correct — left atrium transfers oxygenated blood to left ventricle, which pumps it to the body. Statement (c) is correct — right atrium receives deoxygenated blood via vena cava.
Statement (a) is wrong because pulmonary veins (not arteries) bring oxygenated blood to the left atrium. Statement (d) is wrong because oxygenated blood goes from the left ventricle to the aorta, not directly from the left atrium. Examiners test whether students know which vessel carries oxygenated/deoxygenated blood and the correct sequence of chambers.