The triclinic unit cell has the following parameters:

  • A
    $a = b = c; \alpha = \beta = \gamma = 90^o$
  • B
    $a = b \ne c; \alpha = \beta = \gamma = 90^o$
  • C
    $a \ne b \ne c; \alpha \ne \beta \ne \gamma \ne 90^o$
  • D
    $a = b \ne c; \alpha = \beta = 90^o, \gamma = 120^o$

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Match the crystal system/unit cells mentioned in Column $I$ with their characteristic features mentioned in Column $II$.
Column $I$ Column $II$
$(A)$ Simple cubic and face-centred cubic $(p)$ have these cell parameters $a=b=c$ and $\alpha=\beta=\gamma=90^{\circ}$
$(B)$ Cubic and rhombohedral $(q)$ are two crystal systems
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$(D)$ Hexagonal and monoclinic $(s)$ belong to same crystal system

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