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
In TCA cycle, citrate is conveed into, after losing a molecul of H20 - 
Select and explain. 
A. Isocitrate, B. Cis-aconitate, C. Oxaloacelate, D. Glutarate
B: Cis-aconitate
Answer: B: Cis-aconitate 
Explanation: B i.e. Cis aconitate