This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Carbohydrates, Subject name: Biochemistry
Maximum number of enzymes of krebs cycle are found in - 
Select and explain. 
A. Mitochondrial matrix, B. Intermembrane space, C. Cytosol, D. Ribosome
A: Mitochondrial matrix
Answer: A: Mitochondrial matrix 
Explanation: Ans. is 'a' i.e., Mitochondrial matrix* Kreb's cycle or citric acid cycle happens in mitochondria. All enzymes of citric acid cycle are present in mitochondrial matrix.