**Core Concept**
The renal angle, also known as the costovertebral angle, is an anatomical landmark used to assess for kidney pathology. It is the area between the 10th and 12th ribs, where the kidney is located.

**Why the Correct Answer is Right**
The correct answer lies between the 10th and 12th ribs, as the kidneys are situated in this region. This area is often used in physical examination to assess for renal tenderness or pain, which can be indicative of conditions such as pyelonephritis or nephrolithiasis. The renal angle is also used to guide the placement of needles for percutaneous renal biopsies.

**Why Each Wrong Option is Incorrect**
**Option A:** This is not a correct description of the renal angle.
**Option B:** This is also not a correct description of the renal angle.
**Option C:** This is not accurate, as the renal angle is not located between the 10th and 11th ribs.

**Clinical Pearl / High-Yield Fact**
When performing a physical examination, the renal angle can be used to assess for kidney pathology, and tenderness in this area can be indicative of conditions such as pyelonephritis or nephrolithiasis.

**Correct Answer: C. 10th and 12th ribs**