Q The anesthetic drug injected for paravertebral block is least likely to diffuse to:
A. Epidural space
B. Sub arachinoid space
C. Intercostal space
D. Superior and inferior paravertebral spaces

Explanation
Ans: b. Subarachinoid space
The subarachnoid space is not in direct continuity with the paravertebral space.
Ref: Irwin and Rippes intensive care medicine 6th e/217