Inferior angle of scapula lies at which vertebral level?

**Core Concept**
The inferior angle of the scapula serves as a significant anatomical landmark for various clinical procedures, including the insertion of needles for regional anesthesia and the identification of the scapula's position in the thoracic cavity. The location of the inferior angle is crucial for accurate placement of these interventions.

**Why the Correct Answer is Right**
The inferior angle of the scapula lies at the level of the 7th thoracic vertebra (T7). This positioning is consistent across individuals, making it a reliable reference point for clinical procedures. The scapula's orientation and location on the back are influenced by the trapezius muscle, which plays a key role in its attachment and movement.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because the inferior angle of the scapula does not lie at the level of the 6th thoracic vertebra (T6), which is lower than the actual location.
**Option B:** This option is incorrect because the inferior angle of the scapula does not lie at the level of the 8th thoracic vertebra (T8), which is higher than the actual location.
**Option C:** This option is incorrect because the inferior angle of the scapula does not lie at the level of the 5th thoracic vertebra (T5), which is lower than the actual location.

**Clinical Pearl / High-Yield Fact**
The inferior angle of the scapula serves as a reliable landmark for the insertion of needles for regional anesthesia, particularly for procedures such as interscalene blocks. The correct placement of the needle is crucial for effective anesthesia and minimizing complications.

**Correct Answer:** C. 7th thoracic vertebra (T7).