This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Miscellaneous, Subject name: Medicine
[{'content': 'Albinism - \nSelect and explain. \nA. Hair bulb for tyrosine positivity test is useful only v/hen the child is 5 years old, B. Is associated with platelets abnormality especially with aspirin, C. Complete decussation is invariable in all albinism, D. Is associated with thrombosis under general anaesthesia', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Hermansky-Pudlak syndrome or abbreted HPS) is an extremely rare autosomal recessive disorder which results in oculocutaneous albinism (decreased pigmentation), bleeding problems due to a platelet abnormality (platelet storage pool defect), and storage of an abnormal fat. Ref Davidson 23rd edition pg 1311', 'role': 'assistant'}]