Which of the following statement (s) is (are) true about heart?

1. Left atrium receives oxygenated blood from different parts of body while right atrium receives deoxygenated blood from lungs

2. Left ventricle pumps oxygenated blood to different body parts while right ventricle pumps deoxygenated blood to lungs

3. Left atrium transfers oxygenated blood to right ventricle which sends it to different body parts

4. Right atrium receives deoxygenated blood from different parts of the body while left ventricle pumps oxygenated blood to different parts of the body.