This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: TCA Cycle, Subject name: Biochemistry
Which of the following is anaplerotic reaction: 
Select and explain. 
A. Conversion of Pyruvate to Lactic acid, B. Conversion of Pyruvate to Oxaloacetate, C. Conversion of Pyruvate to Acetyl CoA, D. Conversion of Pyruvate to Acetaldehyde
B: Conversion of Pyruvate to Oxaloacetate
Answer: B: Conversion of Pyruvate to Oxaloacetate 
Explanation: ANAPLEUROTIC reactions reactions which synthesize TCA intermediates. Conversion of pyruvate to Oxaloacetate -most impoant anaplerotic reaction.