In a tetragonal crystal

In tetragonal crystal system, which of following

Assertion (A) : Graphite is an example of tetragonal crystal system. Reason (R ) : For a tetragonal system, a = b != c and alpha = beta = 90^(@), gamma = 120^(@) .

In a trigonal crystal

In a hexagoanl crystal:

The maximum number of Bravais lattices is shown by tetragonal-type crystals.

Compounds [Cu(H_2O)_6]^(2+)(A) and [Ti(H_2O)_6]^(3+) (B) exhibit tetragonal elongation and tetragonal compression,respectively.The unpaired electron A and B are found respectively, in orbitals,