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
Enzymes concerned with the citric acid cycle are found in the: 
Select and explain. 
A. Nucleus, B. Ribosomes, C. Mitochondria, D. Nonparticulate cytoplasm
C: Mitochondria
Answer: C: Mitochondria 
Explanation: None