$CdS$ crystallizes in which type of crystal system?

The relation between axis and angles $a \neq b \neq c$ and $\alpha = \gamma = 90^{\circ}, \beta \neq 90^{\circ}$ corresponds to which crystal system?

The correct option for the number of body-centred unit cells in all $14$ types of Bravais lattice unit cells is:

Which of the following represents the correct axial distances and axial angles for the rhombohedral crystal system?

In a tetragonal crystal :-

Which of the following crystal systems has $a = b = c$ and $\alpha = \beta = \gamma \neq 90^o$?