Match the items in Column I with Column II:
| Column I | Column II |
| A. Diamond to graphite conversion | 1. Short interval of time |
| B. Instantaneous rate | 2. Ordinarily rate of conversion is imperceptible |
| C. Average rate | 3. Long duration of time |
Codes:
| A | B | C | |
| 1. | 2 | 1 | 3 |
| 2. | 1 | 2 | 3 |
| 3. | 3 | 2 | 1 |
| 4. | 1 | 3 | 2 |
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