Study the given diagram of the heart, with blood vessels marked '1' and '2'.
From the following statements, establish the relationship between heart and/or the two blood vessels:
(i) Blood vessel 1 - It carries carbon dioxide rich blood to the lungs.
(ii) Blood vessel 2 - It carries oxygen rich blood from the lungs.
(iii) Blood vessel 2 - Left atrium relaxes as it receives blood from this blood vessel.
(iv) Blood vessel 1 - Right atrium has thick wall as it has to pump blood to this vessel.
The option with correct statements is: