This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General anatomy, Subject name: Anatomy
Chediak_higashi syndrome is due to defect in 
Select and explain. 
A. Opsonisation, B. Chemotaxis, C. LAD, D. Extracellular microbacterial killing
B: Chemotaxis
Answer: B: Chemotaxis 
Explanation: Ref Walter and Israel 7/e p150 Chediak Higashi syndrome is an autosomal ressive Condition in which polymorphs exhibit defective random movements , defective chemotaxis and impairee degranulation on phagocytosis paicles