Match the following:
| Group 1 | Group 2 |
| P. Hall petch relation | 1. Bulk diffusion between grain boundaries |
| Q. Orowan mechanism | 2. Fracture of brittle materials |
| R. Nabarro-Herring creep | 3. Grain boundary strengthening |
| S. Griffith criterion | 4. Dispersion strengthening |
A. P-1, Q-2, R-3, S-4
B. P-2, Q-3, R-4, S-1
C. P-4, Q-1, R-2, S-3
D. P-3, Q-4, R-1, S-2
Answer: Option D
This Question Belongs to Metallurgical Engineering >> Introduction To Metallurgy
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