**Question:** Which of the following statements regarding Torus tubaris is true?

A. Torus tubaris is a small bony projection located on the anterior surface of the first lumbar vertebrae (L1).
B. The torus tubaris is a protective structure for the spinal nerve roots passing through the intervertebral foramen.
C. The torus tubaris is a bony projection located on the posterior surface of the second lumbar vertebrae (L2).
D. The torus tubaris is a rare congenital condition affecting the lumbar spine.

**Correct Answer:**

**B. The torus tubaris is a protective structure for the spinal nerve roots passing through the intervertebral foramen.**

Torus tubaris, also known as torus spinalis, is a bony projection that arises from the vertebral arch, located on the anterior surface of the first lumbar vertebrae (L1). It plays a vital role in protecting the spinal nerve roots passing through the intervertebral foramen, specifically the L1 nerve root. The torus tubaris forms a bony barrier that safeguards the nerve roots from compression or injury, preventing potential complications like radiculopathy or paresthesia.

The other options are incorrect:

**A. Torus tubaris is a small bony projection located on the anterior surface of the first lumbar vertebrae (L1)**: While Torus tubaris is indeed located on the anterior surface of L1, this statement is too specific about its location and does not address its primary function.

**C. The torus tubaris is a bony projection located on the posterior surface of the second lumbar vertebrae (L2)**: This statement is incorrect as Torus tubaris is found on the anterior surface of L1, not L2.

**D. Torus tubaris is a rare congenital condition affecting the lumbar spine**: Torus tubaris is not considered a rare congenital condition but rather a common anatomical feature seen on the lumbar spine, particularly in the anterior surface of L1. Its primary function is to protect the spinal nerve roots, as explained above.