You have which of the following correct combinations of numbers of vertebrae in your vertebral column in the order: cervical; thoracic; lumbar; and sacral-coccygeal regions?
a) 7; 12; 5; 4-5
b) 12; 7; 5; 4-5
c) 5; 12; 7; 4-5
d) 7; 5; 12; 4-5