• # question_answer Which primitive unit cell has unequal edge length $(a\ne b\ne c)$ and all axial angles different from $90{}^\circ$? A) Triclinic B) Hexagonal C) Monoclinic D) Tetragonal

 $K=A{{e}^{-{{E}_{a}}/Rt}}$(i) is true but (ii) is false (iii) should be