To match the pulmonary trunk with its associated heart chamber, we need to understand the flow of blood through the heart. The pulmonary trunk is a major vessel that carries deoxygenated blood from the heart to the lungs. Specifically, it branches off from the right ventricle, which is responsible for pumping this deoxygenated blood.
Therefore, the correct match would be:
Pulmonary trunk – a) Right ventricle
The other chambers and vessels listed do not directly connect with the pulmonary trunk. The left atrium and left ventricle handle oxygenated blood returning from the lungs, while the right atrium receives deoxygenated blood from the body, but does not directly connect to the pulmonary trunk.