What is the total number of crystal systems associated with $14$ Bravais lattices?

The three-dimensional graph of lattice points which sets the pattern for the whole lattice is called:

State the characteristics of a crystal lattice.

Which crystal system does diamond possess?

Where are the constituent particles located in an end-centered unit cell?

Body-centred cubic and face-centred cubic unit cells have $n_1$ and $n_2$ effective number of atoms. Which one of the following $[n_1, n_2]$ combinations is correct?