Match List I with List II.
| List I | List II |
|---|---|
| A. P wave | I. Heart muscles are electrically silent |
| B. QRS complex | II. Depolarisation of ventricles |
| C. T wave | III. Depolarisation of atria |
| D. T–P gap | IV. Repolarisation of ventricles |
Choose the correct answer from the options given below: