5th February 2024

An 18-year-old male presents to the acute medical unit with abdominal pain.

An 18-year-old male presents to the acute medical unit with abdominal pain. This was central and constant and associated with nausea and vomiting. Blood tests showed elevated amylase levels. He has had five separate episodes prior to this. Examination revealed an enlarged liver and spleen. Yellow-orange papules with an erythematous base were also noted along his trunk, knees and elbows. Ophthalmoscopy reveals milky white retinal arteries and veins. 

Which of the following lipoproteins is responsible for the pathogenesis of this condition?