The hybrid states of C in diamond and graphite are respectively:

• A

  ${\mathrm{sp}}^2,{\mathrm{sp}}^3$

• B

  ${\mathrm{sp}}^3,{\mathrm{sp}}^2$

• C

  ${\mathrm{sp}}^2,{\mathrm{sp}}^2$

• D

  ${\mathrm{sp}}^3,{\mathrm{sp}}^3$