In crystallography: [100] refers to a direction (line),
{100} refers to a family of planes (form),
(100) refers to a specific plane (face).
Thus, the sequence for the symbols [100], {100}, and (100) is line, form, and face, making option (D) the correct choice
| Group I | Group II |
| P. Sillimanite | 1. First order |
| Q. Quartz | 2. Second order |
| R. Muscovite | 3. Greater than third order |
| S. Calcite | 4. Third order variegated |
| Group I | Group II |
| P. Bababudan Group | 1. Eastern Dharwar |
| Q. Banded Gneissic Complex-I | 2. Western Dharwar |
| R. Bonai Granite | 3. Aravalli |
| S. Kolar Group | 4. Singhbhum |