The body-centered unit cell is found in which of the following crystal systems?

Which of the following crystal systems does not possess an axis of rotation?

Which of the following unit cell parameters represents the tetragonal crystal system?

Which of the following has a structure similar to a matchbox?

Which among the following pairs of compounds is $NOT$ isomorphous?

The crystal system of a compound with unit cell dimensions $a = 0.387 \ nm$,$b = 0.387 \ nm$ and $c = 0.504 \ nm$ and $\alpha = \beta = 90^{\circ}$ and $\gamma = 120^{\circ}$ is: