## **Core Concept**
The urethra in males is divided into three main parts: the prostatic urethra, the membranous urethra, and the penile (or spongy) urethra. The epithelial lining varies along these parts due to their different embryological origins and functions.

## **Why the Correct Answer is Right**
The part of the urethra below the opening of the ejaculatory ducts is essentially the prostatic urethra. The ejaculatory ducts open into the prostatic urethra. The epithelial lining of the prostatic urethra is **pseudostratified or transitional columnar epithelium**, but it can also be lined by **stratified columnar epithelium** or **cuboidal epithelium** in some areas. However, the key point here is the location and type of epithelium.

## **Why Each Wrong Option is Incorrect**
- **Option A:** This option is incorrect because the lining mentioned does not match the urethral part below the ejaculatory ducts' opening.
- **Option B:** This option suggests a different type of epithelial lining that is not characteristic of the urethra below the ejaculatory ducts.
- **Option D:** Similarly, this option does not accurately describe the epithelial lining of the specified urethral segment.

## **Clinical Pearl / High-Yield Fact**
A key point to remember is that the urethral lining changes along its course: the prostatic urethra is lined by **pseudostratified columnar epithelium** or **transitional epithelium**, the membranous urethra by **pseudostratified or stratified columnar epithelium**, and the penile urethra by **stratified columnar epithelium** or **pseudostratified columnar epithelium**. Understanding these details can help in diagnosing urethral pathologies.

## **Correct Answer:** .