$31$ pairs of spinal nerves are known in humans. Select the option which shows their correct classification into different groups.

• A
  Cervical $-1$ pair,thoracic $-8$ pairs,lumbar $-12$ pairs,sacral $-5$ pairs,coccygeal $-5$ pairs
• B
  Cervical $-8$ pairs,thoracic $-12$ pairs,lumbar $-5$ pairs,sacral $-5$ pairs,coccygeal $-1$ pair
• C
  Cervical $-5$ pairs,thoracic $-5$ pairs,lumbar $-5$ pairs,sacral $-8$ pairs,coccygeal $-1$ pair
• D
  Cervical $-5$ pairs,thoracic $-8$ pairs,lumbar $-5$ pairs,sacral $-12$ pairs,coccygeal $-1$ pair