This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Biochemistry
[{'content': 'Carbon atoms added in FA synthesis \nSelect and explain. \nA. 2 in Ist cycle & 4 in IInd cycle, B. 4 in Ist cycle & 2 in IInd cycle, C. 2 in Ist cycle & 2 in Ilnd cycl, D. 4 in Ist cycle & 4 in II nd cycle', 'role': 'user'}, {'content': 'Answer: B \nExplanation: B i.e. 4 in Ist cycle & 2 in Hnd cycle', 'role': 'assistant'}]