## **Core Concept**
The core concept being tested here is the anatomical knowledge of structures that can be palpated during a per rectal examination (also known as a digital rectal examination or DRE) in an adult male. This examination is crucial for assessing the prostate gland, rectum, and surrounding structures.

## **Why the Correct Answer is Right**
During a per rectal examination in an adult male, the following structures can typically be felt anteriorly: the prostate gland, the seminal vesicles are not usually palpable, but the prostate and the rectal wall can be. The correct answer relates to structures that are not typically palpable or not located anteriorly in this context.

## **Why Each Wrong Option is Incorrect**
- **Option A:** The **prostate gland** is indeed palpable anteriorly during a per rectal examination. It is a walnut-sized gland located just anterior to the rectum, making it easily assessable through this method.
- **Option B:** The **rectal wall** can also be felt during the examination as it is the posterior wall of the rectum, which is directly in contact with the examining finger.
- **Option D:** The **seminal vesicles** are usually not palpable during a routine DRE, but when considering structures that can be felt, the focus is on their typical anatomical location and palpability.

## **Why Option C is Incorrect (Detailed Explanation for Seminal Vesicles)**
- **Option C:** The **seminal vesicles** are not typically palpable during a per rectal examination because they are located more superiorly and laterally, above the prostate gland, and are not directly anterior to the rectal wall in a way that makes them easily felt during a DRE.

## **Clinical Pearl / High-Yield Fact**
A key point to remember is that during a DRE, the **prostate gland** is a crucial structure to assess for size, consistency, and symmetry, which can provide valuable information about benign prostatic hyperplasia (BPH), prostatitis, or prostate cancer.

## **Correct Answer:** . **Seminal Vesicles**