The correct option for axial distances and axial angles for hexagonal crystal system is

• A
  $a \neq b \neq c, \alpha \neq \beta \neq \gamma = 90^{\circ}$
• B
  $a = b \neq c, \alpha = \beta = \gamma = 90^{\circ}$
• C
  $a = b \neq c, \alpha = \beta = 90^{\circ}, \gamma = 120^{\circ}$
• D
  $a \neq b \neq c, \alpha = \beta = \gamma = 90^{\circ}$