Which of the following compound is known as inorganic benzene?

• A

  ${\mathrm{B}}_6{\mathrm{H}}_6$

• B

  ${\mathrm{C}}_5{\mathrm{H}}_5\mathrm{B}$

• C

  ${\mathrm{C}}_3{\mathrm{N}}_3{\mathrm{H}}_3$

• D

  ${\mathrm{B}}_3{\mathrm{N}}_3{\mathrm{H}}_6$