Which of the following crystals has a unit cell such that $a \neq b \neq c$ and $\alpha \neq \beta \neq \gamma \neq 90^{\circ}$?

What is the total number of different types of unit cells in a tetragonal crystal system?

Provide information about the seven crystal systems.

$Assertion (A)$: White tin is an example of a tetragonal system. $Reasoning (R)$: For a tetragonal system,$a=b=c$ and $\alpha=\beta=\gamma \neq 90^{\circ}$. The correct answer is

$A$ unit cell having dimensions $a \neq b \neq c$ and interfacial angles $\alpha \neq \beta \neq \gamma \neq 90^{\circ}$ is known as:

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