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
[{'content': 'All are unique features of WHO growth chas 2006 except \nSelect and explain. \nA. Breast fed infants as normative growth model, B. Sample collection from 6 states in the US, C. Includes new indicators such as skinfold thickness, D. Reiterates children grow similarly all over the world.', 'role': 'user'}, {'content': "Answer: B \nExplanation: WHO growth chas are based on multicentre growth reference study( MGRS) conducted in 6 countries all over the world. Brazil Norway Ghana Oman US India Ref: Nelson's ,20th edition, Page 84-89", 'role': 'assistant'}]