Question

Match the following:

• A. A - V, B - III, C - I, D - II
• B. A - IV, B - II, C - III, D - I
• C. A - V, B - IV, C - I, D - III
• D. A - II, B - I, C - III, D - V

Hint:

Do not confuse vertebrae count (C7) with nerve count (C8). The first 7 nerves exit above the corresponding vertebra, the 8th exits below C7.

Answer 1

The Correct Option is A

Step 1: Recall Spinal Nerve Counts:
Humans have 31 pairs of spinal nerves:

• Cervical nerves (C): 8 pairs ($C1-C8$). Note: There are 7 cervical vertebrae but 8 nerves.
• Thoracic nerves (T): 12 pairs ($T1-T12$).
• Lumbar nerves (L): 5 pairs ($L1-L5$).
• Sacral nerves (S): 5 pairs ($S1-S5$).
• Coccygeal nerves (Co): 1 pair ($Co1$).

Step 2: Matching:

• A. Cervical nerves $\rightarrow$ V. 8 pairs.
• B. Thoracic nerves $\rightarrow$ III. 12 pairs.
• C. Lumbar nerves $\rightarrow$ I. 5 pairs.
• D. Coccygeal nerves $\rightarrow$ II. 1 pair.

Step 3: Conclusion:
The sequence is A-V, B-III, C-I, D-II. Matches Option (A).