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    				| 1. | In a tetragonal crystalA. a=b=c, `alpha =beta =90^(@) ne Y`B. ` alpha=beta = gamma = 90^(@) , a = b ne =0`C. ` alpha = beta = gamma =90^(@) , a ne b ne c`D. `alpha=beta = 90^(@) , gamma = 120^(@) , a=b ne c` | 
| Answer» Correct Answer - C | |