Answer to Snoring can be a Death Knell!
Correct answer is D, the superior vena cava. Cor pulmonale is a condition that causes the right side of the heart to fail. Long-term high blood pressure in the arteries of the lung and right ventricle of the heart can lead to cor pulmonale which can manifest by neck vein engorgement. The swollen legs and belly are due to back-up of venous return also, but in this case it is the inferior vena cava. The stem of the question specifically refers to engorged neck veins and this is the reason that D is the correct answer.
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Answer to this question is based on material presented in lectures 13 of the Thorax Lecture Series.
= Right atrium
= Ascending aorta
= Pulmonary trunk
= Superior vena cava
= Inferior vena cava