Match List I with List II:
| List I | List II |
|---|
| A | Citric acid cycle | I | Cytoplasm |
| B | Glycolysis | II | Mitochondrial matrix |
| C | Electron transport System | III | Intermembrane space of mitochondria |
| D | Proton gradient | IV | Inner mitochondrial membrane |
Choose the correct answer from the options given below: